a shallow recess, especially one in a wall to display a statue or other ornament.
(one's niche) a comfortable or suitable position in life or employment:he is now a partner at a leading law firm and feels he has found his niche
a specialized but profitable corner of the market: [as modifier]:important new niche markets
Ecology a position or role taken by a kind of organism within its community. Such a position may be occupied by different organisms in different localities, e.g., antelopes in Africa and kangaroos in Australia.
place or position (something) in a niche.
early 17th century: from French, literally 'recess', from nicher 'make a nest', based on Latin nidus 'nest'