The definition of abnormal is a description that means unusual, odd or out of the ordinary.
An example of abnormal weather would be 20 inches of rain in a desert.
not normal; not average; not typical; not usual; irregular, esp. to a considerable degree
Origin of abnormalearlier anormal from French anormal, anomal from Late Latin anomalus from Classical Greek an?malos (see anomalous) influenced, influence by Classical Latin abnormis from ab-, from + norma, norm
Not typical, usual, or regular; not normal; deviant.
Origin of abnormalAlteration (influenced by ab- 1) of obsolete anormal from Medieval Latin anormālis blend of Late Latin abnormis (Latin ab- away from ; see ab- 1. ) (Latin norma rule ; see gnō- in Indo-European roots.) anōmalus ; see anomalous .
(comparative more abnormal, superlative most abnormal)
- Not conforming to rule or system; deviating from the usual or normal type. [First attested around the mid 19th century.]
- Of or pertaining to that which is abnormal, in particular, behaviour that deviates from norms of social propriety or accepted standards of mental health. [First attested around the early 20th century.]
- A person or object that is not normal.