D defs.my
Entry 1 sense Webster, 1913

Tuner

/(tūn"ẽr)/ · Tun·er · IPA /ˈtuː.nɚ/
01 n. One who tunes; especially, one whose occupation is to tune musical instruments.
  1. 1.
    One who tunes; especially, one whose occupation is to tune musical instruments.