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migration definition
the
movement
of
persons
from
one
country
or
locality
to
another
a
group
of
people
migrating
together
(especially
in
some
given
time
period)
(chemistry)
the
nonrandom
movement
of
an
atom
or
radical
from
one
place
to
another
within
a
molecule
the
periodic
passage
of
groups
of
animals
(especially
birds
or
fishes)
from
one
region
to
another
for
feeding
or
breeding
來源 : wordnet
來源 : Trending