- tapper⇄tapper (1), noun.
1. a telegraph key that makes a contact and breaks another in one motion.
2. a bell clapper.
3. a person who taps, as at a door.
4. a person who taps train wheels to test their soundness.
5. cobbler. - tapper⇄tapper (2), noun.
1. a person who taps trees for the sap.
2. milking machine.
3. wiretapper.