look out (for sb.,for sth.)
n. a person employed to watch for something to happen 同义词：lookoutlookout mansentinelsentrywatchspotterscoutpicket
an elevated post affording a wide view 同义词：lookoutobservation post
a structure commanding a wide view of its surroundings 同义词：lookoutobservation towerlookout stationobservatory
the act of looking out 同义词：lookoutoutlook