Real Dictionary

nest
A bird's nest is the home that it makes to lay its eggs in.
verb: When a bird nests somewhere, it builds a nest and settles there to lay its eggs.

nest in American English
the structure made or the place chosen by birds for laying their eggs and sheltering their young
intransitive verb: to build or have a nest
noun: a pocketlike, usually more or less circular structure of twigs, grass, mud, etc., formed by a bird, often high in a tree, as a place in which to lay and incubate its eggs and rear its young; any protected place used by a bird for these purposes
transitive verb: to settle or place (something) in or as if in a nest

nest in British English
noun: a place or structure in which birds, fishes, insects, reptiles, mice, etc, lay eggs or give birth to young
verb: to make or inhabit a nest