• WordNet 3.6
    • n migration the movement of persons from one country or locality to another
    • n migration the periodic passage of groups of animals (especially birds or fishes) from one region to another for feeding or breeding
    • n migration (chemistry) the nonrandom movement of an atom or radical from one place to another within a molecule
    • n migration a group of people migrating together (especially in some given time period)
    • ***
Webster's Revised Unabridged Dictionary
  • Interesting fact: The Arctic Tern, which is a small bird, can fly a round trip from the Arctic to the Antarctic and back. This can be as long as twenty thousand miles per year. This is the longest migration for a bird
    • n Migration The act of migrating.
    • ***
Century Dictionary and Cyclopedia
  • Interesting fact: The average speed for a migrating duck is fifty miles per hour.
    • n migration The act of migrating; change of residence or habitat; removal or transit from one locality or latitude to another, especially at a distance. Among animals, the most extensive and regular migrations are performed by birds during spring and fall, and in a general way along meridians of longitude, the vernal migration being northward, the autumnal southward. This is ordinary or equatorial migration. In cold and temperate latitudes of the northern hemisphere nearly all insectivorous birds perforin migration. Some, as sandpipers, which breed only in high latitudes, may be dispersed during their migration over a great part of the world. Others, as swallows, are noted not only for the extent but for the rapidity and regularity of their movements, their arrival and departure being capable of prediction with considerable accuracy. The migration of many water-fowls is scarcely less notable in the same respects. Migration seems to be determined, primarily and chiefly, by conditions of food-supply, but this does not fully account for the apparently needless extent and the wonderful periodicity of the movement, nor for the fact that individuals sometimes return to exactly the same spot to breed again, after passing the winter perhaps thousands of miles away. Migrations of mammals are more irregular than those of birds, less definitely related to latitude and longitude, and more obviously dependent upon food-supply: such are the excursions, often in enormous hordes, of various arctic animals, as lemmings and other rodents, reindeer, musk-oxen, foxes, etc. Such movements do not appear to be specially related to reproduction. Many fishes migrate from and back to the sea, ascending rivers to spawn, as is notably the case with anadromous fishes of the salmou and herring families; with eels the case is reversed; with many fishes the catadromous migration is between deeper and shallower, or colder and warmer, salt water. Periodical migration is also marked with certain insects. Thus, Anosia plexippus, the milkweed-butterfly, migrates southward in the fall to hibernate in the pine woods of the southern United States. The faculty which enables or compels animals to migrate has been named the “instinct of migration”; but the phrase is rather a statement of fact than an explanation of the phenomenon, except in so far as this instinct may be regarded as originating in and being highly developed from the simple necessity of moving about to secure food.
    • n migration A number of animals migrating together; the total of the individuals or species which perform any particular migration; also, the time or period occupied in migrating Change of place; removal.
    • n migration Residence in a foreign country; banishment.
    • n migration In phytogeography, the movement of plants from one area into another. According to F. E. Clements this is properly a narrower term than invasion. See invasion, 4.
    • ***
Chambers's Twentieth Century Dictionary
  • Interesting fact: The tarantula spends most of its life within its burrow, which is an 18-inch vertical hole with an inch-wide opening. When male tarantulas are between the ages of 5 to 7 years, they leave the burrow in search of a female, usually in the early fall. This migration actually signals the end of their life cycle. The males mate with as many females as they can, and then they die around mid-November.
    • ns Migration a change of abode: a removal from one country or climate to another: a number removing together
    • ***


  • Oliver Goldsmith
    “We had no revolutions to fear, nor fatigues to undergo; all our adventures were by the fireside, and all our migrations from the blue bed to the brown.”


Webster's Revised Unabridged Dictionary
L. migratio,: cf. F. migration,
Chambers's Twentieth Century Dictionary
L. migrāre, -ātum; cf. meāre, to go.


In literature:

What birds learn about migration, if anything, I do not see that we have any means of finding out.
"Ways of Nature" by John Burroughs
It is merely a case of tribal migration.
"Five Stages of Greek Religion" by Gilbert Murray
The Becketts and I before long migrated from Monte Carlo, and took a villa between us for a couple of months at Beaulieu.
"Memoirs of Life and Literature" by W. H. Mallock
A quantitative study of the nocturnal migration of birds.
"Mammals of Mesa Verde National Park, Colorado" by Sydney Anderson
Inequalities of earning power are not leveled out by a quick migration of laborers from China to Europe or to America.
"Essentials of Economic Theory" by John Bates Clark
Polish labour continues to migrate to the Eastern provinces.
"German Problems and Personalities" by Charles Sarolea
No, I made that sort of migration several years later.
"Crestlands" by Mary Addams Bayne
Few observe the migration of the turtle-doves, perhaps confusing them with the wood-pigeons, which stay in the fields all the winter.
"The Hills and the Vale" by Richard Jefferies
It migrates in loose flocks sometimes near the earth, at others far above it.
"What Bird is That?" by Frank M. Chapman
The winter rains which migrate equatorward are separated by the Sahara from the equatorial rains which migrate poleward.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5" by Various

In poetry:

Ye have kindred voices clear,
Ye alike unfold the wing,
Migrate hither, sojourn here,
Both attendant on the spring!
"On The Swallow (From The Greek)" by William Cowper
Oh! for angel eye and station,
Far above the battle-cloud,
Whence I'd view the dread migration
Of the unbodied spirit crowd!
"Lines Suggested" by Janet Hamilton
One tree, and one alone,
Of all that load this magic air with spice,
Claims for its own
Your brave migration out of Paradise;
"The Humming Birds" by Alfred Noyes
Bare the Serail, its glory spent and past,
Its trees, now dry, bent low in desolation…
O Istanbul! Dead nomad camp, the last
Great relic of a last and great migration!
"Istanbul" by Ivan Bunin
I feel your eyes traveling, and the autumn is far off:
Grey beret, voice of a bird, heart like a house
Towards which my deep longings migrated
And my kisses fell, happy as embers.
"I Remember You As You Were" by Pablo Neruda
For every bird there is this last migration;
Once more the cooling year kindles her heart;
With a warm passage to the summer station
Love pricks the course in lights across the chart.
"Death of the Bird " by A D Hope

In news:

Builds fishway to encourage river migration.
Allen Hurlbert, University of North Carolina at Chapel Hill – Bird Migration.
How did you come to write about this remarkable migrating bird.
GLOBAL PERSPECTIVE – Catholic priest and theology professor Fr Daniel Groody travels the world to assess issues of migration and their resolution.
Over time, water migrated into the sheetrock, the doors and her furniture.
Whales migrate to island to mate, give birth.
Then all of a sudden, we noticed a burgeoning urban migration west.
Users Weigh Risks in Migration Decision.
Florida residents currently have a chance to name an endangered sea turtle as part of the fourth annual Tour de Turtles, an online migration tracking event that follows 14 sea turtles as they travel the world's oceans.
Detroit's heritage is migrating piece by piece .
The exchanges went for-profit and a third of all trading activity migrated away into the dark recesses of a utility closet.
Last year about 500,000 Mexicans were repatriated from the US, an average annual number, according to National Migration Institute (INM).
Next to a protected national park on the Freycinet Peninsula in Tasmania, this property hugs a gentle curve of sandy shoreline near where migrating whales and dolphins come to play.
The geese stop on the flats during their spring migration north to their nesting grounds in the Arctic.
An experienced tour leader looks at Maine's Monhegan Island the way a migrating bird sees it.

In science:

Note: because orientations can become rotated during migration, migration south is not necessarily the inverse of migration north.
Puzzles, Tableaux and Mosaics
If the orientation is not rotated (i.e. E = E ′ ), then north and south migration are mutually inverse, as are east and west migration.
Puzzles, Tableaux and Mosaics
Otherwise, north and west migration are mutually inverse, as are east and south migration.
Puzzles, Tableaux and Mosaics
Migration gives a bijection between mosaics and LR-tableaux with the same boundary.
Puzzles, Tableaux and Mosaics
Finally migrate F ′ from C to B to form F ′′ .
Puzzles, Tableaux and Mosaics