n. [ F. migraine, LL. hemigrania, L. hemicrania, hemicranium, Gr. "hmikrani`a; "hmi- half + krani`on skull. See Hemi- and Cranium, and cf. Hemicrania, Migraine. ] 1. A kind of intense sick or nervous headache, usually periodical and confined to one side of the head; called also migraine headache. Same as megrim. -- Mi*grain"ous, a. [1913 Webster]

a. [ L. migrans, p. pr. of migrare. See Migrate. ] Migratory. Sir T. Browne. [ 1913 Webster ]

n. 1. A migratory bird, person, or other animal.

2. A person who changes residence frequently in search of employment, especially farm labor, such as harvesting crops seasonally; also called migrant laborer or migrant worker. Sometimes the migrant worker is not a resident of the country in which the work is performed. [ PJC ]

v. i. [ imp. & p. p. Migrated p. pr. & vb. n. Migrating ] [ L. migratus, p. p. of migrare to migrate, transfer. ] [ 1913 Webster ]

1. To remove from one country or region to another, with a view to residence; to change one's place of residence; to remove; as, the Moors who migrated from Africa into Spain; to migrate to the West. [ 1913 Webster ]

2. To pass periodically from one region or climate to another for feeding or breeding; -- said of certain birds, fishes, and quadrupeds. [ 1913 Webster ]

n. [ L. migratio: cf. F. migration. ] The act of migrating. [ 1913 Webster ]

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 ]