1.Definition: (ecology) the status of an organism within its environment and community (affecting its survival as a species)

Category: General

2.Definition: a position particularly well suited to the person who occupies it

"He found his niche in the academic world"

Category: General

3.Definition: a small concavity

Related Noun(s):corner, recess, recession

Category: General

4.Definition: an enclosure that is set back or indented

Related Noun(s):recess

Category: Objects