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

guru

a religious leader or teacher in the Hindu or Sikh religion

Word of the Day

The way we move (Verbs for walking and running)

by Kate Woodford,
March 25, 2015
​​​ This week we’re looking at interesting ways to describe the way that people move. Most of the verbs that we’ll be considering describe how fast or slow people move. Others describe the attitude or state of mind of the person walking or running. Some describe both. Starting with verbs for walking slowly,

Read More 

crossfit noun

March 23, 2015
high-intensity strength training Two women in strappy dresses discussed how much weight they could snatch

Read More