or co-star

[ noun koh-stahr; verb koh-stahr ]

  1. a performer, especially an actor or actress, who shares star billing with another.

  2. a performer whose status is slightly below that of a star.

verb (used without object),co·starred, co·star·ring.
  1. to share star billing with another performer.

  2. to receive billing of slightly less status than that of a star.

verb (used with object),co·starred, co·star·ring.
  1. to present (two or more actors) as having equal billing or prominence.

  2. to present as having slightly less status than that of a star.

Origin of costar

An Americanism dating back to 1915–20; co- + star

Words Nearby costar Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use costar in a sentence

British Dictionary definitions for co-star


  1. an actor who shares star billing with another

verb-stars, -starring or -starred
  1. (intr often foll by with) to share star billing (with another actor)

  2. (tr) to present as sharing top billing: the film co-starred Mae West and W. C. Fields

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012