tunˈer noun

1. A person who tunes instruments, engines, etc
2. Someone who makes music, or sings
3. An apparatus for receiving radio signals
4. A knob, dial, etc by which a radio or television is adjusted to different wavelengths
5. In organs, an adjustable flap for altering the pitch of the tone

tunˈing noun

tunˈy adjective (tunˈier; tunˈiest)

Tuneful, esp in a superficial, obvious way

tuner amplifier noun

A piece of hi-fi equipment incorporating a radio receiver and an amplifier which can also be used with a record player, tape deck, etc

tuneˈsmith noun (facetious)

A songwriter or composer of light music

tuning fork noun

A two-pronged instrument giving a sound of known pitch or vibration

tuning key or tuning hammer noun

A key for turning wrest pins

tuning peg or tuning pin noun

A peg on a musical instrument around which the end of a string is wound and by which it is tuned

call the tune see pay the piper under pipe¹

change one's tune or sing another tune

To alter one's attitude, or way of talking

in tune

1. True in pitch
2. In accord (figurative)

out of tune

1. Not true in pitch
2. Not agreeing (figurative)

to the tune of

To the amount of

tune in

To adjust a radio for reception of a specific station, programme, etc (often with to)

tune one's pipes see under pipe¹

tune out

1. To adjust (a radio, etc) so as to eliminate (a sound, frequency, etc)
2. To ignore

tune up

1. To put instruments into tune for beginning
2. Of engines, etc, to (be) put into smooth working order
3. To begin to perform, strike up (tuneˈ-up noun)