/ Dictionary / Index A abnormal: Meaning and Definition of Find definitions for: ab•nor•mal Pronunciation: (ab-nôr'mul), [key] — adj. not normal, average, typical, or usual; deviating from a standard: abnormal powers of concentration; an abnormal amount of snow; abnormal behavior. extremely or excessively large: abnormal profit. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: abnormal (Thesaurus) Abney level abnormalcy Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language