Also found in: Dictionary, Thesaurus.
Related to straight-faced: touch base, To take care of, hot under the collar, in short order, put on airs, at least
Showing or betraying no emotion whatsoever. I thought he was kidding, but he was totally straight-faced when he told me. The actor's straight-faced delivery made the absurd monologue all the more hilarious.
mod. with a serious, unsmiling face. He was a very straight-faced prof, but he has a tremendous sense of humor.