1. 
2. 
[syn: migrant, migratory]
The Collaborative International Dictionary of English v.0.48:
Migratory \Mi"gra*to*ry\, 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]
WordNet (r) 3.0 (2006):
migratory
    adj 1: used of animals that move seasonally; "migratory birds"
           [ant: nonmigratory, resident]
    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, migratory]
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