The police 'kept' her 'under surveillance'. [=watched her closely]
The bank robbery was recorded by 'surveillance' video cameras.
government 'surveillance' of suspected terrorists
(..) Whoever hit it stripped the shit out of it. - Took 'em out with a heat seeker. - There's something else, Major. This is no ordinary army taxi. It looks more like a surveillance bird to me. - Pick up the trail yet? - Billy's on it. Heat seeker, Dillon. Pretty sophisticated I guess they're getting (..)1987 Predator