Home › Words › T › tantrumtantrum/ˈtæn.tɹʌm/tantrum · noun — an often childish display or fit of bad temper.Definition from Wiktionary (CC BY-SA 3.0).tantrum is pronounced /ˈtæn.tɹʌm/.EtymologyFrom earlier tanterum. Further etymology unknown.nounAn often childish display or fit of bad temper.e.g.“Many parents become embarrassed by their children throwing tantrums in public places.”verbTo throw a tantrum.Definitions & examples from Wiktionary (CC BY-SA 3.0).