Meaning of ABNORMAL in English

ABNORMAL

/ æbˈnɔːml; NAmE -ˈnɔːrml/ adjective

different from what is usual or expected, especially in a way that is worrying, harmful or not wanted :

abnormal levels of sugar in the blood

They thought his behaviour was abnormal.

OPP normal

►  ab·nor·mal·ly / æbˈnɔːməli; NAmE -ˈnɔːrm-/ adverb :

abnormally high blood pressure

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WORD ORIGIN

mid 19th cent.: alteration (by association with Latin abnormis monstrous) of 16th-cent. anormal , from French , variant of anomal , via Latin from Greek anōmalos (from an- not + homalos even)

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.