Source : Webster's Revised Unabridged Dictionary (1913)

Solo \So"lo\, a. (Music)
   Performing, or performed, alone; uncombined, except with
   subordinate parts, voices, or instruments; not concerted.

Solo \So"lo\, n.; pl. E. {Solos}, It. {Soli}. [It., from L.
   solus alone. See {Sole}, a.] (Mus.)
   A tune, air, strain, or a whole piece, played by a single
   person on an instrument, or sung by a single voice.

Source : WordNet®

solo
     adj : composed or performed by a single voice or instrument; "a
           passage for solo clarinet"
     [also: {soli} (pl)]

solo
     n 1: any activity that is performed alone without assistance
     2: a musical composition for one voice or instrument (with or
        without accompaniment)
     3: a flight in which the aircraft pilot is unaccompanied
     [also: {soli} (pl)]

solo
     adv : without anybody else; "the child stayed home alone"; "he
           flew solo" [syn: {alone}, {unaccompanied}]
     v 1: fly alone, without a co-pilot or passengers
     2: perform a piece written for a single instrument
     [also: {soli} (pl)]

Source : Free On-Line Dictionary of Computing

SOLO
     
        [SOL (Semantic Operating Language) + LOGO].  A variant of
        {LOGO} with primitives for dealing with {semantic network}s
        and {pattern matching} rather than lists.
     
        ["A User-Friendly Software Environment for the Novice
        Programmer", M. Eisenstadt , CACM
        27(12):1056-1064 (1983)].