1.  tune(n = noun.communication) air, line, melodic line, melodic phrase, melody, strain - a succession of notes forming a distinctive sequence; "she was humming an air from Beethoven"
is a kind of music
has parts: musical phrase, phrase
has particulars: fanfare, flourish, tucket, glissando, roulade, leitmotif, leitmotiv, theme song, signature, signature tune, theme song, idea, melodic theme, musical theme, theme, part, voice

2.  tune(n = noun.attribute) Array - the property of producing accurately a note of a given pitch; "he cannot sing in tune"; "the clarinet was out of tune"
is a kind of pitch
Derived form verb tune₂

3.  tune(n = noun.act) Array - the adjustment of a radio receiver or other circuit to a required frequency; Array
is a kind of adjustment, alteration, modification

1.  tune(v = verb.change) tune up - adjust for (better) functioning; "tune the engine"
is one way to adjust, correct, set
Derived form noun tuning₁
Sample sentences: Somebody ----s something

2.  tune(v = verb.change) tune up - adjust the pitches of (musical instruments); "My piano needs to be tuned"
is one way to adjust, correct, set
Antonym: untune
Derived forms noun tune₂, noun tuner₁, noun tuning₁
Sample sentences: Somebody ----s something

1.  A sound; a note; a tone. Shak. [1913 Webster]

2.  A rhythmical, melodious, symmetrical series of tones for one voice or instrument, or for any number of voices or instruments in unison, or two or more such series forming parts in harmony; a melody; an air; as, a merry tune; a mournful tune; a slow tune; a psalm tune. See Air. [1913 Webster]
"Like sweet bells jangled, out of tune and harsh." [1913 Webster]

3.  Order; harmony; concord; fit disposition, temper, or humor; right mood. [1913 Webster]
"A child will learn three times as much when he is in tune, as when he . . . is dragged unwillingly to [his task]." [1913 Webster]

1.  To put into a state adapted to produce the proper sounds; to harmonize, to cause to be in tune; to correct the tone of; as, to tune a piano or a violin. Dryden. [1913 Webster]

2.  To give tone to; to attune; to adapt in style of music; to make harmonious. [1913 Webster]
"For now to sorrow must I tune my song." [1913 Webster]

3.  To sing with melody or harmony. [1913 Webster]
"Fountains, and ye, that warble, as ye flow,
Melodious murmurs, warbling tune his praise." [1913 Webster]

4.  To put into a proper state or disposition. Shak. [1913 Webster]

1.  To form one sound to another; to form accordant musical sounds. [1913 Webster]
"Whilst tuning to the water's fall,
The small birds sang to her." [1913 Webster]

2.  To utter inarticulate harmony with the voice; to sing without pronouncing words; to hum. [1913 Webster]

tune, n. & v.
--n. a melody with or without harmony.
--v.
1 tr. put (a musical instrument) in tune.
2 a tr. adjust (a radio receiver etc.) to the particular frequency of the required signals. b intr. (foll. by in) adjust a radio receiver to the required signal (tuned in to Radio 2).
3 tr. adjust (an engine etc.) to run smoothly and efficiently.
4 tr. (foll. by to) adjust or adapt to a required or different purpose, situation, etc.
5 intr. (foll. by with) be in harmony with.

Idiom:
in tune 1 having the correct pitch or intonation (sings in tune).
2 (usu. foll. by with) harmonizing with one's company, surroundings, etc.
out of tune
1 not having the correct pitch or intonation (always plays out of tune).
2 (usu. foll. by with) clashing with one's company etc. to the tune of colloq. to the considerable sum or amount of.
tune up
1 (of an orchestra) bring the instruments to the proper or uniform pitch.
2 begin to play or sing.
3 bring to the most efficient condition.

Derivative:
tunable adj. (also tuneable).

Etymology:
ME: unexpl. var. of TONE

VB  agree, accord, harmonize with, fraternize, be concordant, go hand in hand, run parallel, understand one another, pull together, put up one's horses together, sing in chorus, side with, sympathize with, go with, chime in with, fall in with, come round, be pacified, assent, empathize with, enter into the ideas of, enter into the feelings of, reciprocate, hurler avec les loups, go with the stream, swim with the stream, keep in good humor, render accordant, put in tune, come to an understanding, meet halfway, keep the peace, remain at peace, be harmonious, harmonize, chime, symphonize, transpose, put in tune, tune, accord, string.

N  music, concert, strain, tune, air, melody, aria, arietta, piece of music, work, number, opus, sonata, rondo, rondeau, pastorale, cavatina, roulade, fantasia, concerto, overture, symphony, variations, cadenza, cadence, fugue, canon, quodlibet, serenade, notturno, dithyramb, opera, operetta, oratorio, composition, movement, stave, passamezzo, toccata, Vorspiel, instrumental music, full score, minstrelsy, tweedledum and tweedledee, band, orchestra, concerted piece, potpourri, capriccio, vocal music, vocalism, chaunt, chant, psalm, psalmody, hymn, song, canticle, canzonet, cantata, bravura, lay, ballad, ditty, carol, pastoral, recitative, recitativo, solfeggio, Lydian measures, slow music, slow movement, adagio, minuet, siren strains, soft music, lullaby, dump, dirge, pibroch, martial music, march, dance music, waltz, solo, duet, duo, trio, quartet, quartett, septett, part song, descant, glee, madrigal, catch, round, chorus, chorale, antiphon, antiphony, accompaniment, second, bass, score, bourdon, drone, morceau, terzetto, composer, musician, musical, instrumental, vocal, choral, lyric, operatic, harmonious, Wagnerian, adagio, largo, larghetto, andante, andantino, alla capella, maestoso, moderato, allegro, allegretto, spiritoso, vivace, veloce, presto, prestissimo, con brio, capriccioso, scherzo, scherzando, legato, staccato, crescendo, diminuendo, rallentando, affettuoso, obbligato, pizzicato, desto, in notes by distance made more sweet, like the faint exquisite music of a dream, music arose with its voluptuous swell, music is the universal language of mankind, music's golden tongue, the speech of angels, will sing the savageness out of a bear, music hath charms to soothe the savage beast.

call the tune, in tune, signature tune, tune down, tune in, tune up