/ ˈtjuːnə(r); NAmE ˈtuː-/ noun
1.
(especially in compounds) a person who tunes musical instruments, especially pianos
2.
the part of a radio, television, etc. that you move in order to change the signal and receive the radio or television station that you want
3.
an electronic device that receives a radio signal and sends it to an amplifier so that it can be heard