The Collaborative International Dictionary of English v.0.48:

Symphony \Sym"pho*ny\, n.; pl. Symphonies. [F. symphonie (cf.
   It. sinfonia), L. symphonia, Gr. ?; sy`n with + ? a sound,
   the voice. See Phonetic.]
   1. A consonance or harmony of sounds, agreeable to the ear,
      whether the sounds are vocal or instrumental, or both.
      [1913 Webster]

            The trumpets sound,
            And warlike symphony in heard around. --Dryden.
      [1913 Webster]

   2. A stringed instrument formerly in use, somewhat resembling
      the virginal.
      [1913 Webster]

            With harp and pipe and symphony.      --Chaucer.
      [1913 Webster]

   3. (Mus.)
      (a) An elaborate instrumental composition for a full
          orchestra, consisting usually, like the sonata, of
          three or four contrasted yet inwardly related
          movements, as the allegro, the adagio, the minuet and
          trio, or scherzo, and the finale in quick time. The
          term has recently been applied to large orchestral
          works in freer form, with arguments or programmes to
          explain their meaning, such as the "symphonic poems"
          of Liszt. The term was formerly applied to any
          composition for an orchestra, as overtures, etc., and
          still earlier, to certain compositions partly vocal,
          partly instrumental.
      (b) An instrumental passage at the beginning or end, or in
          the course of, a vocal composition; a prelude,
          interlude, or postude; a ritornello.
          [1913 Webster]

WordNet (r) 3.0 (2006):

symphony
    n 1: a long and complex sonata for symphony orchestra [syn:
         symphony, symphonic music]
    2: a large orchestra; can perform symphonies; "we heard the
       Vienna symphony" [syn: symphony orchestra, symphony,
       philharmonic]

Moby Thesaurus II by Grady Ward, 1.0:

128 Moby Thesaurus words for "symphony":
   German band, Philharmonic, accord, accordance, affinity, agape,
   agreement, amity, attune, attunement, band, big band,
   bonds of harmony, brass, brass band, brass choir, brass quintet,
   brass section, brasses, brotherly love, callithumpian band,
   caritas, cement of friendship, chamber orchestra, charity, chime,
   chiming, classic, classical music, combo, communion, community,
   community of interests, compatibility, concentus, concert,
   concert band, concert music, concertino, concerto, concerto grosso,
   concord, concordance, congeniality, consonance, consonancy,
   consort, correspondence, desks, diapason, dixieland band, empathy,
   ensemble, esprit, esprit de corps, euphony, feeling of identity,
   fellow feeling, fellowship, frictionlessness, gamelan orchestra,
   good vibes, good vibrations, group, happy family, harmonics,
   harmony, heavy harmony, homophony, identity, jazz band, jug band,
   kinship, like-mindedness, longhair music, love, military band,
   monochord, monody, mutuality, oneness, orchestra, peace,
   philharmonic, quartet, quintet, ragtime band, rapport,
   rapprochement, reciprocity, rhapsody, rock-and-roll group,
   semiclassical music, sextet, sharing, sinfonietta, skiffle band,
   solidarity, steel band, street band, string band, string choir,
   string orchestra, string quartet, strings, swing band, sympathy,
   symphonia, symphonic music, symphonic ode, symphony orchestra,
   synchronism, synchronization, team spirit, three-part harmony,
   tone poem, trio, tune, understanding, union, unison, unisonance,
   unity, waits, woodwind, woodwind choir, woodwind quartet,
   woodwinds



The Free On-line Dictionary of Computing (30 December 2018):

Symphony

    Lotus Development's successor to their
   Lotus 1-2-3 spreadsheet.  Unlike 1-2-3, Symphony allowed a
   limited form of multitasking.  The user could switch
   manually between it and MS-DOS and separate graph and
   spreadsheet windows could be opened simultaneously and would
   be updated automatically when cells were changed.  In
   addition, a small word processor could be opened in a third
   window.  These all could be printed out on the same report.
   Symphony could read and write Lotus 1-2-3 files and had
   interactive graphical output and a word processor, thus making
   it effectively a report generator.  Unlike 1-2-3, Symphony was
   not a great commercial success.

   (1995-03-28)