keep a lookout for

US /kiːp ə ˈlʊk.aʊt fɔːr/
UK /kiːp ə ˈlʊk.aʊt fɔːr/
"keep a lookout for" picture
1.

ficar de olho em, estar atento a

to watch carefully for someone or something, especially to prevent danger or to find something specific

:
Please keep a lookout for the delivery truck.
Por favor, fique de olho no caminhão de entrega.
We need to keep a lookout for any suspicious activity.
Precisamos ficar de olho em qualquer atividade suspeita.