1
a
: a pleasing succession of musical tones : melody
b
: a dominant theme
2
: correct musical pitch or consonance
—used chiefly in the phrases in tune and out of tune
3
5
a
: manner of utterance : intonation
specifically
: phonetic modulation
b
archaic
: quality of sound : tone
tuned; tuning
1
: to adjust in musical pitch or cause to be in tune
tuned her guitar
2
a
: to bring into harmony : attune
b
: to adjust for precise functioning
—often used with up
tune up an engine
c
: to make more precise, intense, or effective
3
: to adjust with respect to resonance at a particular frequency: such as
a
: to adjust (a radio or television receiver) to respond to waves of a particular frequency
—often used with in
b
: to establish radio contact with
tune in a directional beacon
4
: to adjust the frequency of the output of (a device) to a chosen frequency or range of frequencies
also
: to alter the frequency of (radiation)
1
: to become attuned
2
: to adjust a radio or television receiver to respond to waves of a particular frequency
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Merriam-Webster unabridged
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