Main Entry: ¹ab·nor·mal

Pronunciation: \(ˌ)ab-ˈnȯr-məl, əb-\

Function: adjective

Etymology: alteration of French anormal, from Medieval Latin anormalis, from Latin a- + Late Latin normalis normal

Date: circa 1836

: deviating from the normal or average : unusual, exceptional <abnormal behavior>

— ab·nor·mal·ly \-mə-lē\ adverb