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costar

[n. koh-stahr; v. koh-stahr] /n. ˈkoʊˌstɑr; v. ˈkoʊˈstɑr/
noun
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), costarred, costarring.
3.
to share star billing with another performer.
4.
to receive billing of slightly less status than that of a star.
verb (used with object), costarred, costarring.
5.
to present (two or more actors) as having equal billing or prominence.
6.
to present as having slightly less status than that of a star.
Also, co-star.
Origin
1915-1920
1915-20, Americanism; co- + star
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for co-star

co-star

noun
1.
an actor who shares star billing with another
verb -stars, -starring, -starred
2.
(intransitive) often foll by with. to share star billing (with another actor)
3.
(transitive) 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
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Word Origin and History for co-star

also costar, 1919 as a verb; 1926 as a noun, from co- + star (v.).

Online Etymology Dictionary, © 2010 Douglas Harper
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