Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “irregular”

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.

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

monster

any imaginary frightening creature, especially one that is large and strange

Word of the Day

What’s that lovely smell?

by Kate Woodford,
October 29, 2014
As adult humans, we can distinguish about 10,000 different smells. It’s no wonder, then, that we have so many words and expressions to describe them. This week we’re taking a look at those smell words – words that describe good smells and words that describe bad smells. Most smell words are either

Read More 

high-frequency trading noun

October 27, 2014
a type of stock market trading that uses very complex technology to trade extremely quickly, often making tiny profits which nevertheless add up to substantial sums Lewis’s book, Flash Boys, is driving a huge amount of attention toward the topic of high frequency trading, and it has rekindled some of

Read More