keep a lookoutto keep watching carefully for something or someone, especially for dangerkeep 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.
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• Then, with a watchful eye, it can keep a lookout for potential prey without revealing its presence.
• Soldiers kept a lookout for enemy planes through the night.
• And send a couple of your boys up here to keep a lookout.
• From his present position, Larsen would be better placed to keep a lookout for trouble and provide backup.
Longman Dictionary
keep a lookout/be on the lookout
[PHRASE [VERB inflects, usu PHR for n
If you are keeping a lookout for something or are on the lookout for it, you are alert and careful about it, either because you do not want to miss it or because it will be unpleasant or harmful and you need to avoid it.
Nature lovers will be on the lookout for eagles, cormorants, and the occasional whale.
Collins Dictionary
