tune

A melody.countableuncountable

• Eric played a catchy tune on his acoustic guitar and Alyssa played the drums.

A song, or short musical composition.countableuncountable

The act of tuning or maintenance.countableinformaluncountable

• Your engine needs a good tune.

The state or condition of being correctly tuned.countableuncountable

• Your engine is now in tune.
• This piano is not in tune.

Temper; frame of mind.countableobsoleteuncountable

A sound; a note; a tone.countableobsoleteuncountable

• Pray you now, if it may the ſtand with the tune of your voices, that I may bee Conſull, I haue heere the Cuſtomarie Gowne.

Order; harmony; concord.countableobsoleteuncountable

• A child will learn three times as much when he is in tune, as when he […] is dragged unwillingly to [his task].

Used to show appreciation or approval of a song.UKslang

• You heard the new Rizzle Kicks song? — Tune!

To adjust (a musical instrument) so that it produces the correct pitches.

• to tune a piano or a violin

To adjust or modify (especially a mechanical or electrical device) so that it functions optimally.

• Tuning the engine gave me an extra twenty horsepower.
• Tune your mind, and anything becomes possible.

To adjust the frequency of a transmitter or receiver, such as on a radio or TV transmitter or receiver, so as to send or receive an electromagnetic signal through a desired frequency band or channel.

• Tune to Channel 6 for all your favourite daytime shows.

Of faculties, senses, etc.: to adapt to or direct towards a particular target.

• My ears were tuned to the sounds of the forest.

To make more precise, intense, or effective; to put into a proper state or disposition.

• [H]ee hath incurred the euerlaſting diſpleaſure of the King, who had euen tun'd his bounty to ſing happineſſe to him.

To make more precise, intense, or effective; to put into a proper state or disposition.; To produce a particular quality of voice by adjusting singing voice synthesis software.slang

• […] Those who are highly skilled in manipulating the Vocaloid technology—e.g., tuning Miku's singing voices—arrange existing[…]
• LOLA's voice is used simply to render basic notes and words with no pitch or expression tuning applied.

To adjust the frequency of a transmitter or receiver, such as on a radio or TV transmitter or receiver, so as to send or receive an electromagnetic signal through a desired frequency band or channel.

To attune; to adapt in style of music; to make harmonious.

• For now to ſorrow must I tune my ſong, / And ſet my Harpe to notes of ſaddeſt wo, […]

To give a certain tone or character to.transitive

To set (lyrics) to music.transitive

• Ginsberg sang some poems from William Blake which he had "tuned".