(architecture) A cavity, hollow, or recess, generally within the thickness of a wall, for a statue, bust, or other erect ornament.

Any similar position, literal or figurative.

Specifically, a cremation niche; a columbarium.

(ecology) A function within an ecological system to which an organism is especially suited.

(by extension) Any position of opportunity for which one is well-suited, such as a particular market in business.

(Islam) An arrow woven into a prayer rug pointing in the direction of qibla.

(transitive) To place in a niche.

(transitive, marketing) To specialize in a niche, or particular narrow section of the market.

Pertaining to or intended for a market niche; having specific appeal; obscure.