# costar

> English word · Noun · IPA /ˈkəʊstɑː(ɹ)/ · frequency rank #57,308

## Definitions
1. A person who shares star billing with another.
2. A person who slightly lacks the status to be considered a star.

## Etymology
From co- + star.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/costar