Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “be up in arms”

be up in arms

to be very upset and angry about something: Local residents are up in arms over plans to close the swimming pool.Angry and displeasedBad-tempered
(Definition of be up in arms from the Cambridge Learner's Dictionary © Cambridge University Press)

Browse related topics

You are looking at an entry to do with Angry and displeased, but you might be interested in these topics from the Anger topic area:

Definitions of “be up in arms” in other dictionaries

Word of the Day

handout

a document given to students or reporters which contains information about a particular subject

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More