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Definition of irregular

irregular

/ɪˈrɛɡ.jʊ.lər/
ir · reg · u · lar

Adverb:irregularly
•
Plural:irregulars
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irregular Lexical Profile

irregular Game Scores & Validity

• adjective

1

Occurring at uneven or unpredictable intervals in time; lacking a fixed schedule or steady rhythm.

Example

"The patient sought medical advice after noticing an irregular heartbeat during exercise."


2

Not even, balanced, or symmetrical in shape, surface, or arrangement.

Example

"The ancient stone wall had an irregular surface worn down by centuries of wind and rain."


3

Contrary to established rules, standard procedures, laws, or conventional customs.

Example

"The auditors flagged several irregular financial transfers that bypassed standard approval protocols."


4

Not following the standard patterns of inflection or conjugation in a language (of a word or grammatical form).

Example

"Children learning English often need extra practice to master irregular verbs such as 'go' and 'went'."

Synonyms
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Antonyms
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• noun

1

A member of an armed force or militia that does not belong to a country's official, regular military establishment.

Example

"Local irregulars familiar with the mountain passes assisted the main army with reconnaissance."


2

A manufactured item or piece of merchandise with slight flaws or imperfections, typically sold at a discounted price.

Example

"The factory outlet sells irregulars with minor stitching defects at half the retail price."

Synonyms
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• Rhymes for irregular

Word Origin & Etymology

Borrowed in the late 14th century from Old French 'irreguler', from Medieval Latin 'irregularis' (originally referring to clergy who violated church canons), formed from the assimilated prefix 'in-' (meaning 'not') and 'regularis' (meaning 'containing rules', from 'regula', 'rule').

Cite this Entry


Wordmom. (2026). Definition of Irregular. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/irregular
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