Definition of tantrum noun from the Oxford Advanced Learner's Dictionary

 

tantrum

 noun
noun
BrE BrE//ˈtæntrəm//
 
; NAmE NAmE//ˈtæntrəm//
 
Babies, Anger
 
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a sudden short period of angry, unreasonable behaviour, especially in a child to have/throw a tantrum Children often have temper tantrums at the age of two or thereabouts. See related entries: Babies, Anger Word Origin early 18th cent.: of unknown origin.Extra examples He had a little temper tantrum yesterday. He threw a tantrum on the school bus. They claimed she threw tantrums and was difficult to work with. Young children often have temper tantrums.
See the Oxford Advanced American Dictionary entry: tantrum