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\u201d ( 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. To place in a niche.