irregular

[ ih-reg-yuh-ler ]
/ ɪˈrɛg yə lər /

adjective

noun

Origin of irregular

1350–1400; < Late Latin irrēgulāris (see ir-2, regular); replacing Middle English irreguler < Middle French
SYNONYMS FOR irregular
4 anomalous, unusual. Irregular, abnormal, exceptional imply a deviation from the regular, the normal, the ordinary, or the usual. Irregular, not according to rule, refers to any deviation, as in form, arrangement, action, and the like; it may imply such deviation as a mere fact, or as regrettable, or even censurable. Abnormal means a deviation from the common rule, often implying that this results in an aberrant or regrettably strange form or nature of a thing: abnormal lack of emotion; A two-headed calf is abnormal. Exceptional means out of the ordinary or unusual; it may refer merely to the rarity of occurrence, or to the superiority of quality: an exceptional case; an exceptional mind. Because of the stigma of abnormal, exceptional is today frequently substituted for it in contexts where such a euphemism may be thought to be appropriate: a school for exceptional children (children who are abnormal in behavior, mental capacity, or the like).
Related formsir·reg·u·lar·ly, adverbqua·si-ir·reg·u·lar, adjectivequa·si-ir·reg·u·lar·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for irregular

British Dictionary definitions for irregular

irregular

/ (ɪˈrɛɡjʊlə) /

adjective


noun

a soldier not in a regular army
(often plural) US imperfect or flawed merchandiseCompare second 1 (def. 15)
Derived Formsirregularly, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for irregular

irregular

[ ĭ-rĕgyə-lər ]

adj.

Not straight, uniform, or symmetrical, as facial features.
Of uneven rate, occurrence, or duration, as a heartbeat.
Deviating from a type; atypical.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.