The term 'prowler' is used to describe a person who engages in criminal activity such as theft, burglary, sneaking, and snooping. A THIEF is someone who steals something without permission, while a BURGLAR is someone who breaks into a building or home to steal something. A SNEAK is someone who moves around quietly and secretly, and a SNOOP is someone who looks around for information or items that are not meant to be seen. All of these activities can be considered prowling.