American Dictionary

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Definition irregular in American English

irregular adjective

adjective
/ɪˈreɡjələr/
1

separated by periods of time that are not equal

Example

irregular heartbeats

Example

His breathing had become irregular.

Synonyms and related words
1.1

happening or done at unexpected times

Example

I work irregular hours, so it's hard to make plans.

Synonyms and related words
2

not even, smooth, or straight in shape or appearance

Example

an irregular surface

Example

irregular patches of shade

Synonyms and related words
3

not following the rules, laws, or usual ways of doing things

Example

highly irregular behavior

Synonyms and related words
3.1

not following the usual rules of grammar. For example, "eat" is an irregular verb because its past tense is "ate" and its past participle is "eaten," not "eated."

Synonyms and related words
5

irregular soldiers are not part of the official army of a country

Synonyms and related words
Definition irregular in American English