Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “irregular”

irregular

adjective  /ɪˈreɡ·jə·lər/ us  

irregular adjective (SHAPE)

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

irregular adjective (TIME/SPACE)

not happening at regular times, or not having usual or regular spaces in between: There are irregular spaces between the words. He showed up at irregular intervals.

irregular adjective (RULE)

(of behavior or actions) not according to usual rules or what is expected grammar An irregular verb, noun, adjective, or other type of word does not obey the usual rules in the language for changing word endings.
(Definition of irregular from the Cambridge Academic Content Dictionary © 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