definition of
[niche]

[1] #1 niche n. a position particularly well suited to the person who occupies it; "he found his niche in the academic world". wn

[2] #2 niche n. [recess, recession, corner] a small concavity. wn

[3] #3 niche n. [recess] an enclosure that is set back or indented. wn

[4] #4 niche n. [ecological niche] (ecology) the status of an organism within its environment and community (affecting its survival as a species). wn