To take note of what is going on; to make oneself aware.
Used other than figuratively or idiomatically: see look, around.
To turn one's head to see what is behind oneself.
To inspect a building or area.
To search a place.
To check that (someone or something) is okay or that a process is continuing appropriately; to check up on; to monitor (someone) through brief, often surreptitious checks.