Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “look out”

look out

verb uk phrasal verb with look   /lʊk/ us  
to watch what is happening and be careful: The police have warned shopkeepers to look out for forged notes.Paying attention and being carefulCautious and vigilant B1 said or shouted in order to tell someone that they are in danger: Look out! There's a car coming!Threats and warnings
(Definition of look out from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of look out?
Browse related topics

You are looking at an entry to do with Paying attention and being careful, but you might be interested in these topics from the Attention and care topic area:

Add Cambridge dictionaries to your browser to your website

Definitions of “look out” in other dictionaries

Word of the Day

improvisation

a performance that an actor, musician, etc. has not practised or planned

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More