A recess in a wall, as for holding a statue or urn.
A cranny, hollow, or crevice, as in rock.
A situation or activity specially suited to a person's interests, abilities, or nature: found her niche in life.
A special area of demand for a product or service: "One niche that is approaching mass-market proportions is held by regional magazines” ( Brad Edmondson).
Ecology The function or position of an organism or population within an ecological community.
Ecology The particular area within a habitat occupied by an organism.