Definition of

Niche

  1. (noun, state) a position particularly well suited to the person who occupies it
  2. (noun, shape) a small concavity
  3. (noun, artifact) an enclosure that is set back or indented
  4. (noun, state) (ecology) the status of an organism within its environment and community (affecting its survival as a species)

via WordNet, Princeton University

Origin of the word Niche

  1. 1611, "shallow recess in a wall," from Fr. niche "recess (for a dog), kennel," 14c., perhaps from It. nicchia "niche, nook," from nicchio "seashell," probably from L. mitulus "mussel," but the change of -m- to -n- is not explained. Another suggestion is that the word is from an O.Fr. noun derived from nichier "to nestle, nest, bu… more

via Online Etymology Dictionary, ©2001 Douglas Harper

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