We found 4 dictionaries that define the word be up in arms:

General (3 matching dictionaries)

1. be up in arms: Cambridge Advanced Learner's Dictionary
2. be up in arms: Dictionary.com
3. be up in arms: Longman Dictionary of Contemporary English

Miscellaneous (1 matching dictionary)

4. be up in arms: Idioms

▸ Words similar to be up in arms ▸ Usage examples for be up in arms ▸ Idioms related to be up in arms ▸ Wikipedia articles (New!) ▸ Words that often appear near be up in arms ▸ Rhymes of be up in arms ▸ Invented words related to be up in arms