irregular
UK /ɪˈɹɛɡ.jʊ.lə/ · US /ɪˈɹɛɡ.jə.lɚ/ adjective, noun
Forms irregulars
- adjective Nonstandard; not conforming to rules or expectations.
- adjective Of a surface, rough.
- adjective Without symmetry, regularity, or uniformity.
- adjective (geometry) Of a polygon, not regular; having sides that are not equal or angles that are not equal.
- adjective (geometry) Of a polyhedron, whose faces are not all regular polygons (or are not equally inclined to each other).
- adjective (grammar) Of a word, not following the regular or expected patterns of inflection in a given language. “"Calves", "cacti", and "children" are irregular plurals.”
- adjective (gastroenterology) Having abnormal bowel movements at inconsistent intervals.
- noun A soldier who is not a member of an official military force and who may not use regular army tactics.
- noun One who does not regularly attend a venue.
Synonyms
coarse unstable heteroclite abnormal singular salebrous unsteady guerrilla guerilla insurgent second unpredictable atypical temporary maverick unorthodox
Antonyms
Etymology
From Middle English irreguler, from Old French irreguler, from Medieval Latin or Late Latin irrēgulāris, from in- + regularis, equivalent to ir- + regular.
Webster’s 1913
- adjective Not regular; not conforming to a law, method, or usage recognized as the general rule; not according to common form; not conformable to nature, to the rules of moral rectitude, or to established principles; not normal; unnatural; immethodical; unsymmetrical; erratic; no straight; not uniform; as, an irregular line; an irregular figure; an irregular verse; an irregular physician; an irregular proceeding; irregular motion; irregular conduct, etc. Cf. Regular.
- noun One who is not regular; especially, a soldier not in regular service.
Etymology [Pref. ir- not + regular: cf. F. irrégulier.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “irregular”, CC BY-SA 4.0. Details