We found one dictionary that defines the word keep sb at arm's length:

General (1 matching dictionary)

1. keep sb at arm's length: Cambridge Advanced Learner's Dictionary

▸ Words similar to keep sb at arm's length ▸ Usage examples for keep sb at arm's length ▸ Idioms related to keep sb at arm's length ▸ Wikipedia articles (New!) ▸ Words that often appear near keep sb at arm's length ▸ Rhymes of keep sb at arm's length ▸ Invented words related to keep sb at arm's length