-
nouna group of people migrating together (especially in some given time period)type of:
-
noun(chemistry) the nonrandom movement of an atom or radical from one place to another within a moleculetype of:
-
nounthe movement of persons from one country or locality to another
-
nounthe periodic passage of groups of animals (especially birds or fishes) from one region to another for feeding or breedingtype of: