a position particularly well suited to the person who occupies it
He found his niche in the academic world.
source: WordNet 3.0
a small concavity
source: WordNet 3.0
an enclosure that is set back or indented
source: WordNet 3.0
(ecology) the status of an organism within its environment and community (affecting its survival as a species)
source: WordNet 3.0
A cavity, hollow, or recess, generally within the thickness of a wall, for a statue, bust, or other erect ornament. hence, any similar position, literal or figurative.
