Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “irregular”

See all translations

irregular

adjective uk   /ɪˈreɡ.jə.lər/ us    /-lɚ/

irregular adjective (RULE)

formal (of behaviour or actions) not according to usual rules or what is expected: Releasing the goods without an invoice is most irregular.B1 specialized language An irregular verb, noun, adjective, etc. does not obey the usual rules for words in the language.
More examples

irregular adjective (SHAPE)

B2 not regular in shape or form; having parts of different shapes or sizes: an irregular coastline irregular teeth

irregular adjective (TIME/SPACE)

B2 not happening at regular times or not with regular spaces in between: an irregular heartbeat They met at irregular intervals. US informal not emptying your bowels as often as you would usually

irregular adjective (SOLDIER)

(of a soldier) fighting for a country but not as a member of its official army
irregularly
adverb uk   /-li/ us  
irregularly shaped The verb acts irregularly.

irregular

noun [C] uk   /ɪˈreɡ.jə.lər/ us    /-lɚ/
a soldier who is not a member of the official army of a country
(Definition of irregular from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of irregular?
Add Cambridge dictionaries to your browser to your website

Definitions of “irregular” in other dictionaries

Word of the Day

pot luck

anything that is available or is found by chance, rather than something chosen, planned, or prepared

Word of the Day

Think long and hard; the language of decisions

by Liz Walter,
January 28, 2015
One of the best ways (perhaps the best way) to improve your English is to learn how words go together in phrases, idioms, or other patterns such as verb/noun or adjective/noun pairs (often called ‘collocations’). This blog looks at some useful phrases and collocations connected with the subject of decisions, something we

Read More 

micro pig noun

January 26, 2015
an extremely small pig, bred to be a pet Micro pigs have become popular pets recently, with famous owners including Victoria Beckham, Paris Hilton and Olympic diver, Tom Daley.

Read More