mis ‧ be ‧ ha ‧ viour BrE AmE British English , misbehavior American English /ˌmɪsbɪˈheɪvjə $ -ər/ noun [uncountable]
[ Word Family: noun : BEHAVIOUR/BEHAVIOR , MISBEHAVIOUR/MISBEHAVIOR , BEHAVIOURISM/BEHAVIORISM , BEHAVIOURIST/BEHAVIORIST ; verb : ↑ behave , ↑ misbehave ; adverb : BEHAVIOURALLY/BEHAVIORALLY ; adjective : BEHAVIOURAL/BEHAVIORAL ]
bad behaviour that is not acceptable to other people SYN misconduct :
Even the most minor forms of misbehaviour were punished.