a place made or chosen by a bird to lay its eggs in and to live in:
In May the females build a nest and lay their eggs.
Young eagles leave the nest after only two months.
a place where insects or small animals live:
a field mouse's nest
to leave your parents' home and start living somewhere else when you are an adult:
Both daughters were ready to fly the nest.
a place where people are secretly doing a lot of illegal or dishonest things
a set of tables etc that fit inside each other