Longman Dictionary of Contemporary English homepage



be on the lookout for somebody/something

to continuously watch a place or pay attention in order to find something you want or to be ready for problems or opportunities [↪ look out for]:
We're always on the lookout for new business opportunities.
Police were on the lookout for anyone behaving suspiciously.

keep a lookout

to keep watching carefully for something or someone, especially for danger
keep a lookout for
We were instructed to keep a lookout for enemy aircraft.
When you're driving, keep a sharp lookout (=watch extra carefully) for cyclists.


[countable] someone whose duty is to watch carefully for something, especially for danger


[countable] a place for a lookout to watch from

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