transitive. To watch with hostile intent; to spy upon; to lie in wait for. Obsolete.

To watch (a person, etc.) in a secret or stealthy manner; to keep under observation with hostile intent; to act as a spy upon (one).

transitive. To act as a spy upon, to watch (a person); to inspect as a spy (sometimes with out); to examine closely. Also, to watch for, look out…

transitive. Perhaps: to watch or spy on. Obsolete. rare.

transitive. To watch, spy on. slang.

to dog with spies.

transitive. Originally U.S. To look at or listen to (a person, activity, etc.) through a keyhole; (hence) to eavesdrop or spy on. Also: to obtain…

colloquial (originally U.S.). A table, an account; a check; esp. in to keep tabs (or a tab) on; also figurative (cf. tab, v. 2). Also, a bill or…

(transitive) to watch as a detective.