n (architecture) A cavity, hollow, or recess, generally within the thickness of a wall, for a statue, bust, or other erectornament. Hence, any similar position, literal or figurative.
n (biology) A function within an ecological system to which an organism is especially suited.
n (context|by extension) Any position of opportunity for which one is well-suited, such as a particular market in business.
n An arrow woven into a Muslim prayer rug pointing in the direction of Mecca.