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definir

to define

Complete conjugation tables and interactive practice exercises. This is a regular -ir verb.

The Spanish verb definir means to define.

Present tense:

yodefino
defines
él/ella/usteddefine
nosotrosdefinimos
vosotrosdefinís
ellos/ellas/ustedesdefinen

Complete Conjugation Tables

Reference all tenses and moods

🔄 Conjugations

subjunctive

imperfect

ellos/ellas/ustedesdefinieran
yodefiniera
definieras
vosotrosdefinierais
nosotrosdefiniéramos
él/ella/usteddefiniera

Use the imperfect subjunctive (definiera/definiese) for past hypotheticals or wishes.

Forms, examples & usage →

present

ellos/ellas/ustedesdefinan
yodefina
definas
vosotrosdefináis
nosotrosdefinamos
él/ella/usteddefina

Use the present subjunctive (defina/defina) after expressions of doubt, desire, or emotion.

Forms, examples & usage →

imperative

negative

no definas
vosotrosno defináis
ustedesno definan
nosotrosno definamos
ustedno defina

Use 'no + present subjunctive' for negative commands like 'don't define!'.

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affirmative

define
vosotrosdefinid
ustedesdefinan
nosotrosdefinamos
usteddefina

Use the imperative of definir for direct commands like 'define!', 'let's define!'.

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indicative

conditional

ellos/ellas/ustedesdefinirían
yodefiniría
definirías
vosotrosdefiniríais
nosotrosdefiniríamos
él/ella/usteddefiniría

Use the conditional of 'definir' for 'I would define', 'you would define', 'they would define'.

Forms, examples & usage →

preterite

ellos/ellas/ustedesdefinieron
yodefiní
definiste
vosotrosdefinisteis
nosotrosdefinimos
él/ella/usteddefinió

Use the preterite of 'definir' for completed actions like 'I defined' or 'she defined'.

Forms, examples & usage →

imperfect

ellos/ellas/ustedesdefinían
yodefinía
definías
vosotrosdefiníais
nosotrosdefiníamos
él/ella/usteddefinía

Use the imperfect of 'definir' for ongoing or habitual past actions like 'I used to define' or 'she was defining'.

Forms, examples & usage →

present

ellos/ellas/ustedesdefinen
yodefino
defines
vosotrosdefinís
nosotrosdefinimos
él/ella/usteddefine

Use the present of 'definir' for 'I define', 'you define', 'they define' happening now or habitually.

Forms, examples & usage →

future

ellos/ellas/ustedesdefinirán
yodefiniré
definirás
vosotrosdefiniréis
nosotrosdefiniremos
él/ella/usteddefinirá

Use the future of 'definir' for 'I will define', 'you will define', 'they will define'.

Forms, examples & usage →

Practice Conjugations

Test your knowledge with interactive exercises

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Take definir from tables to real Spanish

Conjugation tables are the start. Read 200+ illustrated and narrated Spanish stories to see 'definir' in action across real sentences — and build the instinct that native speakers have.