behaviour */*/*/

UK [bɪˈheɪvjə(r)] / US [bɪˈheɪvjər] noun [uncountable]
Word forms "behaviour":
singular behaviour plural behaviours

Get it right: behaviour:

Behaviour is usually an uncountable noun, so it is rarely used in the plural:
Wrong: Parents should be able to prevent their children's crimes or bad behaviours.
Right: Parents should be able to prevent their children's crimes or bad behaviour.
Wrong: The media often encourage violence and aggressive behaviours.
Right: The media often encourage violence and aggressive behaviour.   The plural form "behaviours" is a specialized term used in fields such as psychology, social science, and education. This use is much less common than the uncountable use: In this chapter, we discuss strategies for dealing with the problem behaviours of young children.

1)

a) the way that someone behaves

Anna was sick of her brother's behaviour.

Injury to the brain often produces changes in behaviour.

observations of animal behaviour

governments seeking to influence voter behaviour

violent/aggressive/disruptive behaviour

ways of teaching parents to deal with problem behaviour

behaviour towards:

I was shocked by his behaviour towards his family.

pattern of behaviour:

the patterns of social behaviour that we learn

b) [countable] a particular way of behaving

These behaviours should be discouraged.

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Collocations:
Adjectives frequently used with behaviour
▪  aggressive, antisocial, bad, criminal, deviant, disruptive, insulting, threatening, unacceptable, undesirable, violent

2) science the way that a substance, metal etc always reacts because of the laws of science

Scientists are studying the behaviour of the new gas.

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- be on your best behaviour