tuning device

noun
UK /ˈtjuːnɪŋ dɪˌvaɪs/
US /ˈtuːnɪŋ dɪˌvaɪs/

A tuning device is a small tool that helps you make a musical instrument sound just right.

She clipped the tuning device onto her guitar and played each string until it was in tune.


OTHER MEANINGS

2. A piece of equipment used to adjust a machine or radio so it works at the correct setting.

The engineer used a tuning device to set the radio to the right frequency.

3. A tool used to adjust the pitch of a voice or instrument during practice.

The choir director kept a tuning device on the piano to check the singers' notes.

4. Any small gadget that helps bring something into proper working order.

He bought a tuning device to fine-tune the engine of his model car.