a structure or place made or chosen by a bird for laying eggs and sheltering its young

two sparrows frantically building a nest

a nest site

a place filled with undesirable people, activities, or things

a nest of spies

a set of similar objects of graduated sizes, made so that each smaller one fits into the next in size for storage

a nest of tables

(of a bird or other animal) use or build a nest

the owls often nest in barns

fit (an object or objects) inside a larger one

the town is nested inside a large crater on the flanks of a volcano