the act of tapping a telephone or telegraph line to get information tap a telephone or telegraph wire to get information; "The FBI was tapping the phone line of the suspected spy"; "Is this hotel room bugged?
If someone wiretaps your telephone, they attach a special device to the line so that they can secretly listen to your conversations. The coach said his club had wire-tapped the hotel room of a player during a road trip. = bug Wiretap is also a noun. tapes of telephone conversations that can have been obtained only by illegal wiretaps. + wiretapping wire·tapping allegations of wiretapping