Source : Webster's Revised Unabridged Dictionary (1913)

Nomad \Nom"ad\, a.
   Roving; nomadic.

Nomad \Nom"ad\, n. [L. nomas, -adis, Gr. ?, ?, pasturing,
   roaming without fixed home, fr. ? a pasture, allotted abode,
   fr. ? to distribute, allot, drive to pasture; prob. akin to
   AS. niman to take, and E. nimble: cf. F. nomade. Cf.
   {Astronomy}, {Economy}, {Nimble}, {Nemesis}, {Numb},
   {Number}.]
   One of a race or tribe that has no fixed location, but
   wanders from place to place in search of pasture or game.

Source : WordNet®

nomad
     n : a member of a people who have no permanent home but move
         about according to the seasons

Source : Free On-Line Dictionary of Computing

NOMAD
     
         A {database} language.
     
        Version: NOMAD2 from {Must Software} International.
     
        ["NOMAD Reference Manual", Form 1004, National CSS Inc, Dec
        1976].
     
        (1995-04-01)