the way in which one acts or conducts oneself, especially towards others:he will vouch for her good behaviourhis insulting behaviour towards me [as modifier]:behaviour patterns [count noun]:management is a set of techniques and behaviours for getting things done
the way in which an animal or person behaves in response to a particular situation or stimulus:the feeding behaviour of predators
the way in which a machine or natural phenomenon works or functions:the erratic behaviour of the old car
be on one's best behaviour
behave well in a social situation or when being observed:warn them to be on their best behaviour