üyesidir

Üyesidir is a Turkish predicative expression meaning “is a member of” or “belongs as a member.” It combines the noun üye (member) with the copular suffix -dir, forming a phrase that identifies the subject as belonging to a group or organization. In typical use it appears with a genitive construction to specify the group: X'in üyesidir, meaning “is a member of X.”

Usage examples include O kulübün üyesidir (He is a member of the club) or Bu derneğin üyesidir (She is a member of this association). The form is common in formal or descriptive writing, such as biographies, official statements, and membership listings, where precise identification of affiliation is required. Turkish also uses other related constructions to express membership, such as noun phrases like üye ve/ya da üyelik, though üyesidir specifically plays the predicative role.

Grammar note: üyesidir is the third-person singular form of the predicative copula when linked to a noun referring to membership. Turkish copulas have several variants (-dır, -dir, -dur, -dür) chosen by vowel harmony, and üyesidir reflects this system in the context of the noun üye. The sentence structure typically places the organization in the genitive case (e.g., kulübün) before the predicative form.

See also: üye, üyelik, üyeler.