n. pl. chim·neys 1. a. A passage through which smoke and gases escape from a fire or furnace; a flue.
b. The usually vertical structure containing a chimney.
c. The part of such a structure that rises above a roof.
2. Chiefly British A smokestack, as of a ship or locomotive.
3. A glass tube for enclosing the flame of a lamp.
4. Something, such as a narrow cleft in a cliff, resembling a chimney.