What is "surveilled"

Usage examples of "surveilled".

They loop-thelooped and licked their lips and surveilled every surface in sight.

Although Cooper and other officers surveilled the house where the killers had assembled and took down license numbers, they inexplicably decided to take a lunch break less then 45 minutes before the march.

General Aguinaldo was going to have to rely on aircraft and the FIST’s unmanned aerial vehicles for intelligence, but the UAVs wouldn’t do much good until he had some idea where to send them—their range was too short and the area to be surveilled too vast for them to be sent out on effective random patrols.

General Aguinaldo was going to have to rely on aircraft and the FIST's unmanned aerial vehicles for intelligence, but the UAVs wouldn't do much good until he had some idea where to send them--their range was too short and the area to be surveilled too vast for them to be sent out on effective random patrols.

He believed the residence was probably surveilled ahead of time and that the UNSUB had most likely been inside before, either through legitimate or illegitimate means.