| 释义 |
mi·gra·tion
\mīˈgrāshən\ noun
(-s)
Etymology: French or Latin; French, from Latin migration-, migratio, from migratus (past participle of migrare to migrate) + -ion-, -io -ion — more at migrate
1. : the act, process, or an instance of migrating: as
a.
(1) : the act or an instance of moving from one country, region, or place to settle in another
< for the first time, the United States counted a net deficit by migration — Oscar Handlin >
< migration to the suburbs — C.B.Palmer b. 1910 >
(2) : the act or an instance of moving from one area to another in search of work (as seasonal labor)
< the circle of their migrations reached as far north as the beet fields of Michigan — Oscar Handlin >
b. : periodic movement from one region or climate to another for feeding or breeding
< the migrations of birds >
c.
(1) : a shifting of an atom or atoms from one part of the molecule to another
(2) : a movement or drift of ions toward one or the other electrode under the influence of electromotive force
d. : an underground movement of oil, gas, or water not occasioned by artificial means
2. : the individuals taking part in a migratory movement or those migrating during a given period
• mi·gra·tion·al \(ˈ)mī|grāshənəl, -shnəl\ adjective |