Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “illegal”

See all translations

illegal

adjective uk   /ɪˈliː.ɡəl/ us  
B2 not allowed by law: a campaign to stop the illegal sale of cigarettes to children under 16 Prostitution is illegal in some countries. It is illegal to drive a car that is not registered and insured. Cocaine, LSD, and heroin are all illegal drugs/substances.
More examples
illegally
adverb uk   /-i/ us  
B2 They entered the country illegally. an illegally parked car

illegal

noun [C] // informal
someone who lives or works in another country when they do not have the legal right to do this: He said ID cards would make it easier to deport illegals.
Translations of “illegal”
in Korean 불법의…
in Arabic غَيْر قَانُوني…
in French illégal…
in Turkish yasadışı, kanuna/yasalara aykırı…
in Italian illegale…
in Chinese (Traditional) 非法的,違法的…
in Russian незаконный…
in Polish nielegalny…
in Spanish ilegal…
in Portuguese ilegal…
in German ungesetzlich…
in Catalan il·legal, il·lícit…
in Japanese 違法の…
in Chinese (Simplified) 非法的,违法的…
(Definition of illegal from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of illegal?
Add Cambridge dictionaries to your browser to your website

Definitions of “illegal” in other dictionaries

Word of the Day

piglet

a baby pig

Word of the Day

I won’t tolerate it! Replacing formal words with phrasal verbs.

by Liz Walter,
April 01, 2015
When you are using a language, it is important to understand if a word is formal or informal, so that you can use it in an appropriate way. You might hear people saying dosh for money, or spud for potato, but they wouldn’t write those words in a formal essay. Similarly, a

Read More 

stackin’ p

March 30, 2015
idiom slang earning a lot of money ‘That’s a very generous present.”Yeah, well, she’s stackin’ p, innit?’

Read More