Welcome to a new Spanish grammar lesson! Today I’ll teach you all you need to know about the “definir” conjugation in Spanish!

Definir is the Spanish verb for “to define”. It is a regular IR verb. It is used to explain the meaning, nature, or characteristics of something.

​​Whether you’re a newbie in Spanish or looking to fine-tune your language skills, this comprehensive guide will help you traverse the regular beauties of “Definir” with confidence and ease. 

It’s time to learn some Spanish grammar, one tense at a time! Are you ready? Let’s go!

Read more: THE 150 MOST COMMON SPANISH VERBS (IRREGULAR + REGULAR)

“Definir” Conjugation Indicative / Indicativo

The indicative tense (el modo indicativo) is one of the three grammatical moods used to express different attitudes or purposes in speech. The indicative mood is used to make factual statements, ask questions, and express opinions about actions or events that are considered real or certain.

Present Tense Definir Conjugation / Presente

The present tense is used to describe actions happening in the present or to express general truths or habitual actions.

Yo	Defino
Tú	Defines
Él/Ella/Usted	Define
Nosotros	Definimos
Vosotros	Definís
Ellos/Ellas/Ustedes	Definen

Examples:

1. Yo defino mi estilo de vida como saludable. (I define my lifestyle as healthy.)
2. Tú defines muy bien lo que quieres. (You define very well what you want.)
3. Ella define el problema de manera clara. (She defines the problem clearly.)

Simple Past Definir Conjugation / Pasado 

The simple past tense (preterite) is used to describe completed actions in the past, often with specific time frames or events.

Yo	Definí
Tú	Definiste
Él/Ella/Usted	Definió
Nosotros	Definimos
Vosotros	Definisteis
Ellos/Ellas/Ustedes	Definieron

Examples:

1. Ellos definieron las reglas antes del juego. (They defined the rules before the game.)
2. Nosotros definimos el plan para la reunión. (We defined the plan for the meeting.)
3. Tú definiste el concepto de manera precisa. (You defined the concept precisely.)

Imperfect Definir Conjugation / Imperfecto

Spanish imperfect tense is used to describe ongoing, repeated, or habitual actions in the past, as well as to set the stage or provide background information

Yo	Definía
Tú	Definías
Él/Ella/Usted	Definía
Nosotros	Definíamos
Vosotros	Definíais
Ellos/Ellas/Ustedes	Definían

Examples:

1. Yo definía mis metas cada año. (I used to define my goals every year.)
2. Usted definía los términos del contrato con cuidado. (You used to define the terms of the contract carefully.)
3. Ellos definían el problema en cada reunión. (They used to define the problem in every meeting.)

Present Continuous / Presente Continuo

The present continuous tense (also known as “estar + gerundio”) is used to describe actions that are currently happening in the present moment or to express temporary situations.

Yo	Estoy definiendo
Tú	Estás definiendo
Él/Ella/Usted	Está definiendo
Nosotros	Estamos definiendo
Vosotros	Estáis definiendo
Ellos/Ellas/Ustedes	Están definiendo

Examples:

1. Vosotros estáis definiendo los objetivos del proyecto. (You all are defining the project’s objectives.)
2. Nosotros estamos definiendo los detalles del acuerdo. (We are defining the details of the agreement.)
3. Tú estás definiendo tu futuro con tus decisiones. (You are defining your future with your decisions.)

Future Tense Definir Conjugation / Futuro

The Spanish future tense is used to express actions or events that will happen in the future, indicating something that has not yet occurred.

Yo	Definiré
Tú	Definirás
Él/Ella/Usted	Definirá
Nosotros	Definiremos
Vosotros	Definiréis
Ellos/Ellas/Ustedes	Definirán

Examples:

1. Mañana definiré mi plan de estudios. (Tomorrow I will define my study plan.)
2. Pronto definirás tus prioridades. (Soon you will define your priorities.)
3. Ellos definirán las reglas del torneo. (They will define the tournament rules.)

Conditional Definir Conjugation / Condicional

The conditional tense is used to express hypothetical or speculative actions or events that would happen under certain conditions in the present or future.

Yo	Definiría
Tú	Definirías
Él/Ella/Usted	Definiría
Nosotros	Definiríamos
Vosotros	Definiríais
Ellos/Ellas/Ustedes	Definirían

Examples:

1. Nosotros definiríamos mejor el problema con más información. (We would define the problem better with more information.)
2. Vosotros definiríais las reglas si tuvierais tiempo. (You all would define the rules if you had time.)
3. Tú definirías tu objetivo con más claridad. (You would define your goal more clearly.)

Present Perfect / pretérito perfecto compuesto

Spanish present perfect tense (also known as “pretérito perfecto compuesto”) is used to express actions that have occurred in the past but have a connection to the present, emphasizing the result or consequences of those actions.

Yo	He definido
Tú	Has definido
Él/Ella/Usted	Ha definido
Nosotros	Hemos definido
Vosotros	Habéis definido
Ellos/Ellas/Ustedes	Han definido

Examples:

1. Ellos han definido el plan de trabajo. (They have defined the work plan.)
2. Ella ha definido sus prioridades. (She has defined her priorities.)
3. Tú has definido muy bien tus metas. (You have defined your goals very well.)

Past Perfect Definir Conjugation / Pretérico Pluscuamperfecto

Spanish past perfect tense (also known as “pretérito pluscuamperfecto”) is used to describe actions that occurred before another past action or event, expressing a past-in-the-past relationship.

Yo	Había definido
Tú	Habías definido
Él/Ella/Usted	Había definido
Nosotros	Habíamos definido
Vosotros	Habéis definido
Ellos/Ellas/Ustedes	Habían definido

Examples:

1. Vosotros habéis definido claramente las reglas. (You all have clearly defined the rules.)
2. Yo había definido mis objetivos antes de empezar. (I had defined my goals before starting.)
3. Nosotros habíamos definido el proyecto antes de presentarlo. (We had defined the project before presenting it.)

Future Perfect / Futuro Perfecto

The Spanish future perfect tense is used to express actions that will have been completed in the future, indicating an action that will be finished before another specified future time or event.

Yo	Habré definido
Tú	Habrás definido
Él/Ella/Usted	Habrá definido
Nosotros	Habremos definido
Vosotros	Habréis definido
Ellos/Ellas/Ustedes	Habrán definido

Examples:

1. Para mañana, habremos definido el plan de acción. (By tomorrow, we will have defined the action plan.)
2. ​​Para el fin de la semana, habré definido mis objetivos. (By the end of the week, I will have defined my goals.)
3. Para entonces, habrás definido tu estrategia. (By then, you will have defined your strategy.) 

Conditional Perfect / Condicional Perfect

The conditional perfect tense is used to express hypothetical or speculative actions that would have been completed in the past, indicating an action that would have happened prior to another past event.

Yo	Habría definido
Tú	Habrías definido
Él/Ella/Usted	Habría definido
Nosotros	Habríamos definido
Vosotros	Habríais definido
Ellos/Ellas/Ustedes	Habrían definido

Examples:

1. Yo habría definido mejor el problema con más información. (I would have defined the problem better with more information.)
2. Usted habría definido las reglas de otra manera. (You would have defined the rules differently.)
3. Ella habría definido sus prioridades antes de tomar una decisión. (She would have defined her priorities before making a decision.)

“Definir” Conjugation Subjunctive / Subjuntivo

The subjunctive tense (el modo subjuntivo) is one of the three grammatical moods used to express different attitudes or purposes in speech. The subjunctive mood is used to express doubt, uncertainty, subjectivity, emotion, and hypothetical situations.

Present Tense / Presente

The Spanish subjunctive present tense is used to express subjective actions, desires, doubts, recommendations, or possibilities, often introduced by certain triggers such as expressions of doubt, necessity, or influence.

Yo	Defina
Tú	Definas
Él/Ella/Usted	Defina
Nosotros	Definamos
Vosotros	Defináis
Ellos/Ellas/Ustedes	Definan

Examples:

1. Espero que ellos definan bien sus objetivos. (I hope they define their goals well.)
2. Ojalá vosotras defináis pronto vuestra estrategia. (I hope you all define your strategy soon.)
3. Es importante que definamos las reglas antes de empezar. (It’s important that we define the rules before starting.)

Imperfect / Imperfecto

This tense is used to express hypothetical or unreal actions, desires, doubts, or recommendations in the past, often introduced by certain triggers such as expressions of doubt, uncertainty, or unreal conditions.

Yo	Definiera
Tú	Definieras
Él/Ella/Usted	Definiera
Nosotros	Definiéramos
Vosotros	Definierais
Ellos/Ellas/Ustedes	Definieran

Examples:

1. Me gustaría que tú definieras claramente tu postura. (I would like you to define your position clearly.)
2. Si ella definiera sus prioridades, sería más fácil tomar decisiones. (If she defined her priorities, it would be easier to make decisions.)
3. Era necesario que nosotros definiéramos las reglas antes de la reunión. (It was necessary for us to define the rules before the meeting.)

Future Tense / Futuro

The Spanish subjunctive future tense is used to express hypothetical or uncertain actions, desires, doubts, or recommendations in the future.

Yo	Definiere
Tú	Definieres
Él/Ella/Usted	Definiere
Nosotros	Definiéremos
Vosotros	Definiereis
Ellos/Ellas/Ustedes	Definieren

Examples:

1. Si definíereis los términos, no habrá confusión. (If you all define the terms, there will be no confusion.)
2. Cuando definiéremos el plan, lo compartiremos con todos. (When we define the plan, we will share it with everyone.)
3. Si tú definieres los límites, sería más fácil alcanzar un acuerdo. (If you define the limits, it would be easier to reach an agreement.)

Present Perfect / Pretérito Perfecto

Spanish subjunctive present perfect tense is used to express hypothetical or unreal actions, desires, doubts, or recommendations in the present with a connection to the past, indicating actions that would have been completed prior to the present moment.

Yo	Haya definido
Tú	Hayas definido
Él/Ella/Usted	Haya definido
Nosotros	Hayamos definido
Vosotros	Hayáis definido
Ellos/Ellas/Ustedes	Hayan definido

Examples:

1. Es posible que hayamos definido todos los detalles antes de la reunión. (It’s possible that we have defined all the details before the meeting.)
2. Me alegra que hayas definido tus metas. (I’m glad that you have defined your goals.)
3. Ojalá que ella haya definido su posición para la conferencia. (I hope that she has defined her position for the conference.)

Past Perfect / Pretérico Pluscuamperfecto

Spanish subjunctive past perfect tense is used to express hypothetical or unreal actions, desires, doubts, or recommendations in the past with a connection to a previous past event, indicating actions that would have been completed before that past event.

Yo	Hubiera definido
Tú	Hubieras definido
Él/Ella/Usted	Hubiera definido
Nosotros	Hubiéramos definido
Vosotros	Hubierais definido
Ellos/Ellas/Ustedes	Hubieran definido

Examples:

1. Si hubiéramos definido el plan antes, habríamos evitado el error. (If we had defined the plan earlier, we would have avoided the mistake.)
2. Si tú hubiera definido las reglas, habría sido más fácil jugar. (If you had defined the rules, it would have been easier to play.)
3. Si ellos hubieran definido sus objetivos, habrían logrado el proyecto. (If they had defined their goals, they would have completed the project.)

Future Perfect / Futuro Perfecto

The future perfect tense is used to express hypothetical or unreal actions, desires, doubts, or recommendations in the future with a connection to a future event, indicating actions that would have been completed before that future event.

Yo	Hubiere definido
Tú	Hubieres definido
Él/Ella/Usted	Hubiere definido
Nosotros	Hubiéremos definido
Vosotros	Hubiereis definido
Ellos/Ellas/Ustedes	Hubieren definido

Examples:

1. Si hubiereis definido los términos, no habría problemas. (If you all have defined the terms, there will be no problems.)
2. Si tú hubieres definido tus prioridades, habrías tomado una mejor decisión. (If you had defined your priorities, you would have made a better decision.)
3. Cuando hubiéremos definido el proyecto, lo presentaremos a todos. (When we have defined the project, we will present it to everyone.)

“Definir” Conjugation Imperative / Imperativo

The imperative tense (el modo imperativo) is one of the verb moods used to express commands, orders, or requests. It is used to tell someone what to do or what not to do.

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Affirmative / Afirmativos

Spanish affirmative refers to the use of positive statements or expressions that indicate agreement, confirmation, or positive response to a question or statement.

Yo	–
Tú	Define
Él/Ella/Usted	Defina
Nosotros	Definamos
Vosotros	Definid
Ellos/Ellas/Ustedes	Definan

Examples:

1. Definamos las reglas antes de empezar el juego. (Let’s define the rules before starting the game.)
2. Definid vuestros objetivos claramente. (Define your goals clearly.)
3. Define qué quieres lograr este año. (Define what you want to achieve this year.)

Negative / Negativos

Spanish negative refers to the use of negative statements or expressions that indicate negation, denial, or disagreement with a question or statement.

Yo	–
Tú	No definas
Él/Ella/Usted	No defina
Nosotros	No definamos
Vosotros	No defináis
Ellos/Ellas/Ustedes	No definan

Examples:

1. No definan las reglas sin consultarlo primero. (Don’t define the rules without consulting first.)
2. No defina sus ideas tan rápidamente, piénselo un poco más. (Don’t define your ideas so quickly, think about it a little more.)
3. No definas el problema sin conocer todos los detalles. (Don’t define the problem without knowing all the details.)

Take Your Spanish To The Next Level!

Mastering “Definir” is about growing within the Spanish culture. Whether you’re just starting on your Spanish language adventure or seeking to refine your skills, knowing how to wield “Definir” will help you navigate the linguistic landscape with confidence and fluency.

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