We found 6 dictionaries that define the word have a field day:

General (5 matching dictionaries)

1. have a field day: Merriam-Webster
2. have a field day: Cambridge Advanced Learner's Dictionary
3. have a field day: Longman Dictionary of Contemporary English

Miscellaneous (1 matching dictionary)

4. have a field day: Idioms

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