Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “warn”

See all translations

warn

verb [T]
 
 
/wɔːn/
OF DANGER B1 to tell someone that something bad may happen in the future, so that they can prevent it: [+ that] I warned you that it would be cold but you still wouldn't wear a coat. I've been warning him for months.Threats and warnings
ADVISE to advise someone not to do something that could cause danger or trouble: [+ to do sth] I warned you not to tell her.Threats and warnings
(Definition of warn from the Cambridge Learners Dictionary © Cambridge University Press)
Add Cambridge dictionaries to your browser to your website

Definitions of “warn” in other dictionaries

Word of the Day

thug

a man who acts violently, especially to commit a crime

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