We found 3 dictionaries that define the word keep a straight face:

General (2 matching dictionaries)

1. keep a straight face: Merriam-Webster
2. keep a straight face: Longman Dictionary of Contemporary English

Miscellaneous (1 matching dictionary)

3. keep a straight face: Idioms

▸ Words similar to keep a straight face ▸ Usage examples for keep a straight face ▸ Idioms related to keep a straight face ▸ Wikipedia articles (New!) ▸ Words that often appear near keep a straight face ▸ Rhymes of keep a straight face ▸ Invented words related to keep a straight face