Definition of behave in English:

behave

Syllabification: be·have
Pronunciation: /bəˈhāv
 
/

verb

[no object]
1 [with adverbial] Act or conduct oneself in a specified way, especially toward others: he always behaved like a gentleman you should behave affectionately toward the patient
More example sentences
  • I think of him as a friend, and he has always behaved like a gentleman whenever I see him.
  • And you can tell a lot about a woman by how she behaves towards her nanny.
  • The club claims that the man behaved violently towards a Union officer who was collecting entrance fees and had to be restrained by security staff on hand.
Synonyms
1.1(Of a machine or natural phenomenon) work or function in a specified way: each car behaves differently
More example sentences
  • Some thought that water waves behaved differently from acoustic or other waves, or from pulses along a string.
  • Phenomena that we previously thought of as waves can sometimes behave like particles.
  • Energy behaves and performs in ways and manners that are different from matter, although there might be some similarities.
2 [often in imperative] Conduct oneself in accordance with the accepted norms of a society or group: you can go as long as you behave (behave oneself) they were expected to behave themselves
More example sentences
  • It is only because you have admitted the breach of this order at the earliest opportunity and fortunately you were behaving yourself in that pizza take-away that we are not going to send you to prison.
  • ‘People think you should be behaving yourself at 54,’ says Spencer, ‘they think you should have said what you've got to say.’
  • He wound his window down and asked, ‘Are you behaving yourself?’
Synonyms
act correctly, act properly, conduct oneself well, be well behaved, be good; be polite, show good manners, mind one's manners

Origin

late Middle English: from be- + have in the sense 'have or bear (oneself) in a particular way' (corresponding to modern German sich behaben).

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