Tantrum/ˈtæntrəm/ Definition 1 of 2Pro Tip 1/3Child Behavior Tantrum often describes typical behavior in young kids struggling to express emotions. Whenever he can't play outside, the toddler has a tantrum. Pro Tip 2/3Strong Emotion The word 'tantrum' implies there is a strong emotional component, usually anger or frustration. She screamed and kicked during her tantrum. Pro Tip 3/3Short-Lived A tantrum is typically a short-lived episode, not an extended period of behavior. The child’s tantrum lasted only a few minutes.