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be on best behavior

VERB

behave

Synonyms

STRONGEST

manage

STRONG

control direct

WEAK

act correctly act one's age act with decorum be civil be good be nice be orderly comport oneself conduct oneself properly demean oneself deport oneself discipline oneself keep one's nose clean keep the peace live up to manage oneself mind one's manners mind one's p's and q's observe golden rule observe the law play fair shape up toe the mark watch one's step

Antonyms

WEAK

act up misbehave

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Black tie is obligatory, and everyone is supposed to be on best behavior at an event oozing with seriousness.

From Reuters • Feb. 26, 2011