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ENGLISH · A WORD WITH POSSIBILITIES

costar.

A person who shares star billing with another.

6 characters2 syllables approx.English language

Meaning & usage

noun/ˈkəʊstɑː(ɹ)/

  1. A person who shares star billing with another.

    The once famous actor objected to his costar having a bigger dressing room.

  2. A person who slightly lacks the status to be considered a star.

    Alas, always a costar but never a star.
Where this word comes from

Etymology tree Proto-Indo-European *ḱe? Proto-Indo-European *ḱóm Proto-Italic *kom Proto-Italic *kom- Latin con- Latin co-lbor. English co- Proto-Indo-European *h₂eHs- Proto-Indo-European *-tḗr Proto-Indo-European *h₂stḗr Proto-Germanic *sternǭ Proto-West Germanic *sternō Proto-West Germanic *sterrō Old English steorra Middle English sterre English star English costar From co- + star.

verb/ˈkəʊstɑː(ɹ)/

  1. To perform with the billing of a costar.

    intransitive
    People thought his career was over but now he will get to costar on Broadway next month.

  2. To feature (a number of star performers) jointly.

    transitive
Where this word comes from

Etymology tree Proto-Indo-European *ḱe? Proto-Indo-European *ḱóm Proto-Italic *kom Proto-Italic *kom- Latin con- Latin co-lbor. English co- Proto-Indo-European *h₂eHs- Proto-Indo-European *-tḗr Proto-Indo-European *h₂stḗr Proto-Germanic *sternǭ Proto-West Germanic *sternō Proto-West Germanic *sterrō Old English steorra Middle English sterre English star English costar From co- + star.

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.