1. Having the rating X: an X-rated movie.
2. Vulgar, obscene, or explicit in the treatment of sex: an X-rated novel; X-rated graffiti.

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.