irregular

Pronunciation: /ɪˈɹɛɡ.jʊ.lə/

The English word “irregular” has 9 meanings listed here.

adjective

Nonstandard; not conforming to rules or expectations.
Of a surface, rough.
Without symmetry, regularity, or uniformity.
Of a polygon, not regular; having sides that are not equal or angles that are not equal.
Of a polyhedron, whose faces are not all regular polygons (or are not equally inclined to each other).
Of a word, not following the regular or expected patterns of inflection in a given language.
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.
One who does not regularly attend a venue.

Etymology

From Middle English irreguler, from Old French irreguler, from Medieval Latin or Late Latin irrēgulāris, from in- + regularis, equivalent to ir- + regular.

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Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.