Definitions of music on the Web:

• an artistic form of auditory communication incorporating instrumental or vocal tones in a structured and continuous manner
• any agreeable (pleasing and harmonious) sounds; "he fell asleep to the music of the wind chimes"
• (music) the sounds produced by singers or musical instruments (or reproductions of such sounds)

wordnet.princeton.edu/perl/webwn

1. Music is an art form that involves organised sounds and silence. It is expressed in terms of pitch (which includes melody and harmony), rhythm (which includes tempo and meter), and the quality of sound (which includes timbre, articulation, dynamics, and texture). ...
   en.wikipedia.org/wiki/Music

The organization of sounds with some degree of rhythm, melody, and harmony.
www.geocities.com/mecmirror/m.htm

organized sound
www.learner.org/channel/workshops/artsineveryclassroom/p1popups/vocabulary.html

Organized sound; the written-down representation of those sounds.
www.laco.org/glossary/

Connecting passage of contrasting music between two important themes in a composition and commonly in popular music, a musical bridge is used to prepare for the return of the original theme. In thirty-two bar form (AABA) the bridge (B) is also known as the middle-eight or release. ...
www.songstuff.com/glossary/

Titles that analyze composition, composers, and the ways music affects the quality of life.
lib.ucr.edu/depts/acquisitions/YBP NSP GLOSSARY EXTERNAL revised6-02.php

contemporary review, letter, personal account, score, sound recording
ww2.lafayette.edu/~library/guides/primarysources/definitions.html

Any person(s) responsible for the musical score or music track accompanying a moving image work. This includes the composition of the musical score and/or lyrics, the selection of the works to be performed, the arrangement of the composition, its orchestration, the adaptation of the music track ...
www.cinema.ucla.edu/CPM Voyager/relatorterms.html

[from Greek mousike (techne) the art of the Muses] The music of the Greeks did not signify merely the harmony of sounds, but actually imbodied the idea of inner harmony of the spirit, the becoming at one with the spirit of the Muses, so that the soul responded in harmonic rhythm to the beat of ...
www.theosociety.org/pasadena/etgloss/mp-mz.htm

Sound with a pleasing quality, an identifiable pitch, and a repeated rhythm.
www.iadeaf.k12.ia.us/glossarymn.html

Music has been defined as generally as "organized sound" and specifically so as to require an entire book to define. A general definition may best be defined as "sounds and pitches organized in time to create a chosen artistic or aestetic statement. ...
www.smu.edu/totw/def.htm

The cost of licensing music on a non-exclusive basis (stock), or the cost of creating, composing and recording music (original) usually on an exclusive basis. Licensing fees, residuals, transfers and search costs are included when applicable.
www.aice.org/

To orchestrate. To arrange for a specific instrument.
www.h-u-m.net/terms/index.shtml

any music that comes from the audio track. Music might be diegetic (a song on the radio of a car a character is driving) or nondiegetic (scary music when a villain appears on screen).
faculty.salisbury.edu/~dtjohnson/filmterms.htm

In some religions, ritual music consists primarily of performances of songs by a choir/soloist, hymn singing by the congregation, and instrumental organ music. In Paganism, there is more diversity in ritual music. ...
www.circlesanctuary.org/aboutpagan/people.htm

In television, theme music as well as incidental music, plays an important part in the design of the programme to create atmosphere. In theatre, music may be totally absent or it may be live or pre-recorded and played by the sound technician.
www.tki.org.nz/r/arts/being_eve/glossary_e.php

n. the art of combining sounds or sequences of notes into harmonious patterns pleasing to the ear and satisfying to the emotions; melody. [Gk. musikos, pert to the muses]
freespace.virgin.net/cad.cables/glossary.htm