The meaning of ABNORMAL is deviating from the normal or average; often : unusual in an unwelcome or problematic way. How to use abnormal in a sentence.

Abnormal definition: not normal, average, typical, or usual; deviating from a standard.. See examples of ABNORMAL used in a sentence.

ABNORMAL definition: 1. different from what is usual or average, especially in a way that is bad: 2. different from…. Learn more.

Someone or something that is abnormal is unusual, especially in a way that is worrying.

2 days ago · Curious about what does abnormal mean and how it shapes perceptions? Dive into the real story behind this word and find out what makes it tick—click to reveal more!

Definition of abnormal adjective from the Oxford Advanced Learner's Dictionary. different from what is usual or expected, especially in a way that worries somebody or is harmful or not …

abnormal (æbˈnɔːməl) adj 1. not normal; deviating from the usual or typical; extraordinary 2. informal odd in behaviour or appearance; strange

WordReference Random House Learner's Dictionary of American English © 2025 ab•nor•mal /æbˈnɔrməl/ adj. not normal or usual: His wild behavior that day was clearly abnormal. …

Something that is abnormal is out of the ordinary, or not typical. Abnormal is a combination of the Latin prefix ab which means “away from,” and the English word normal.

abnormal, adj. & n. meanings, etymology, pronunciation and more in the Oxford English Dictionary