ˈkast-ˌmāt also ˈkäst-
plural castmates
: a fellow member of a cast of actors
I look at some of my castmates and see all the great acting they're doing …Kristin Bauer van Straten, quoted in Tampa Bay Times, 14 June 2013

Word History

First Known Use

1931, in the meaning defined above

Time Traveler
The first known use of castmate was in 1931

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Dictionary Entries Near castmate

Cite this Entry

“Castmate.” Dictionary, Merriam-Webster, Accessed 23 Apr. 2024.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!