alert Definition in the Cambridge English Dictionary Cambridge dictionaries logo

Definition of “alert” - English Dictionary

"alert" in American English

See all translations

alertadjective

 us   /əˈlɜrt/
quick to ​see, ​understand, and ​act in a ​particularsituation: When you’re ​driving, you must ​stay alert. We had to be alert to any ​dangersigns in the ​economy.

alertnoun [C/U]

 us   /əˈlɜrt/
a ​warning to ​people to get ​ready to ​deal with something ​dangerous: [U] The ​police were on the alert for (= ​watchingcarefully for) any ​sign of ​trouble.
alert
verb [T]  us   /əˈlɜrt/
The ​autocompany mailed ​letters to owners of that ​modelcar, alerting them of ​safetyrisks.
(Definition of alert from the Cambridge Academic Content Dictionary © Cambridge University Press)







"alert" in British English

See all translations

alertadjective

uk   /əˈlɜːt/  us   /-ˈlɝːt/
C1 quick to ​see, ​understand, and ​act in a ​particularsituation: I'm not ​feeling very alert today - not enough ​sleep last ​night! A ​couple of alert ​readerspostedcomments on the ​websitepointing out the ​mistake. Parents should be alert tosuddenchanges in children's ​behaviour.

expend iconexpend iconMore examples

alertness
noun [U] uk   us   /-nəs/

alertnoun [C or U]

uk   /əˈlɜːt/  us   /-ˈlɝːt/

alertverb [T]

uk   /əˈlɜːt/  us   /-ˈlɝːt/
C2 to ​warn someone of a ​possiblydangeroussituation: An ​anonymousletter alerted ​police to the ​possibility of a ​terroristattack at the ​airport.

expend iconexpend iconMore examples

(Definition of alert from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of alert?
Add Cambridge dictionaries to your browser to your website

More meanings of “alert”

Word of the Day

hipster

someone who is very influenced by the most recent ideas and fashions

Word of the Day

Chest pains and palpitations: talking about illness (2)
Chest pains and palpitations: talking about illness (2)
by Liz Walter,
February 03, 2016
My previous post (My leg hurts: Talking about illness (1)) presented some general vocabulary to use at the doctor’s. This one looks at some more specific areas of illness and explains some useful words and phrases that you may need to use or understand on a visit to the doctor’s. There are several

Read More 

awesomesauce noun
awesomesauce noun
February 01, 2016
slang the state of being extremely good or enjoyable or something or someone that is extremely good or enjoyable Recovering from the awesomesauce of another fab #Vidcon!!

Read More