Definition of "Nest" :
noun: a kind of gun emplacement
"A machine-gun nest."
noun: furniture pieces made to fit close together
noun: a gang of people (criminals or spies or terrorists) assembled in one locality
"A nest of thieves."
noun: a cosy or secluded retreat
noun: a structure in which animals lay eggs or give birth to their young
verb: gather nests
verb: move or arrange oneself in a comfortable and cozy position
verb: fit together or fit inside
verb: inhabit a nest, usually after building
"Birds are nesting outside my window every Spring."