[1] : The Collaborative International Dictionary of English v.0.48

migratory \mi"gratory\, a. cf. f. migratoire.
   1913 webster
   1. removing regularly or occasionally from one region or
      climate to another; as, migratory birds.
      1913 webster

   2. hence, roving; wandering; nomad; as, migratory habits; a
      migratory life.
      1913 webster

   migratory locust zool. see locust.

   migratory thrush zool., the american robin. see robin.
      1913 webster
see also:
migratory locust locust migratory thrush robin 

[2] : WordNet (r) 2.0

migratory
     adj 1: used of animals that move seasonally; "migratory birds"
            ant: nonmigratory
     2: habitually moving from place to place especially in search
        of seasonal work; "appalled by the social conditions of
        migrant life"; "migratory workers" syn: migrant
see also:
nonmigratory migrant 

[3] : Moby Thesaurus II by Grady Ward, 1.0

35 moby thesaurus words for "migratory":
   circumforaneous, discursive, divagatory, drifting, errant,
   flitting, floating, footloose, footloose and fancy-free, fugitive,
   gadding, gypsy-like, gypsyish, landloping, meandering, migrant,
   migrational, mobile, nomad, nomadic, rambling, ranging, roaming,
   roving, shifting, straggling, straying, strolling, traipsing,
   transient, transitory, transmigratory, vagabond, vagrant,
   wandering

Migratory >> M Words
Migratory, definition of term: Migratory
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