autodefinirse

To define oneself, to self-proclaim an identity or label — se autodefine como feminista, como independiente, como artista. Very common in contemporary writing about identity, politics, and self-description.

• Se autodefine como una persona muy independiente. — She defines herself as a very independent person.
• El partido se autodefine como centrista. — The party defines itself as centrist.
• Prefiere no autodefinirse con ninguna etiqueta fija. — He prefers not to define himself with any fixed label.

Using autodefinirse for a formal dictionary-style definition — it's specifically about a person or group choosing their own identity label, not defining a word or concept.

Often confused with definir.