Pronunciation: (bel'frē),[key] —n., —pl.-fries. 1. a bell tower, either attached to a church or other building or standing apart.
2. the part of a steeple or other structure in which a bell is hung.
3. a frame of timberwork that holds or encloses a bell.
4. Slang.head; mind: a belfry full of curious notions. 5. have bats in one's belfry. See bat2 (def. 3).