Is "définir" regular or irregular in French?

"définir" is a regular 2nd verb in French. It follows the standard conjugation pattern for 2nd verbs.

How do you conjugate "définir" in the present tense?

In the Présent, "définir" conjugates as: définis, définis, définissons, and more. See the full table above.

In the Passé Composé, "définir" conjugates as: ai défini, as défini, avons défini, and more. See the full table above.

"définir" (to define) is one of the most commonly used verbs in French.

French · Verb · #281 most common

to define

Regular2nd ending

In the tables below, the stem is shown in black and the ending in purple.

Current actions, habits, and general truths.

Completed past actions with present relevance.

Ongoing or habitual past actions, descriptions, and background.

Future events, promises, and formal predictions.

Hypothetical outcomes, polite requests, and reported future.

Doubt, desire, necessity, and emotion in subordinate clauses.

Actions completed before another past action.

Common questions

Is "définir" regular or irregular in French?: "définir" is a regular 2nd verb in French. It follows the standard conjugation pattern for 2nd verbs.
How do you conjugate "définir" in the present tense?: In the Présent, "définir" conjugates as: définis, définis, définissons, and more. See the full table above.
What is the past tense of "définir" in French?: In the Passé Composé, "définir" conjugates as: ai défini, as défini, avons défini, and more. See the full table above.
How common is "définir" in French?: "définir" (to define) is one of the most commonly used verbs in French.