an act or instance of tapping telephone or telegraph wires for evidence or other information.

to obtain (information, evidence, etc.) by tapping telephone or telegraph wires

to wiretap conversations.

to listen in on by means of a wiretap

to wiretap a telephone; to wiretap a conversation.

to tap telephone or telegraph wires for evidence, information, etc.

pertaining to or obtained by wiretap.

verb

bug