from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A bell tower, especially one attached to a building.
- n. The part of a tower or steeple in which bells are hung.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A moveable tower used in sieges.
- n. A shed.
- n. An alarm-tower; a watchtower containing an alarm-bell.
- n. A tower or steeple specifically for containing bells, especially as part of a church.
- n. A part of a large tower or steeple, specifically for containing bells.
from the GNU version of the Collaborative International Dictionary of English
- n. A movable tower erected by besiegers for purposes of attack and defense.
- n. A bell tower, usually attached to a church or other building, but sometimes separate; a campanile.
- n. A room in a tower in which a bell is or may be hung; or a cupola or turret for the same purpose.
- n. The framing on which a bell is suspended.
from The Century Dictionary and Cyclopedia
- n. A movable wooden tower used in the middle ages in attacking fortified places.
- n. A stationary tower near a fortified place, in which were stationed sentinels to watch the surrounding country and give notice of the approach of an enemy.
- n. A bell-tower, generally attached to a church or other building, but sometimes standing apart as an independent structure.
- n. That part of a steeple or other structure in which a bell is hung; particularly, the frame of timberwork which sustains the bell. See cut under bell-gable.
- n. Nautical, the ornamental frame in which the ship's bell is hung.
- n. A shed used as a shelter for cattle or for farm implements or produce.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a room (often at the top of a tower) where bells are hung
- n. a bell tower; usually stands alone unattached to a building
Middle English belfrei, from Old North French belfroi, alteration of Old French berfrei, berfroi.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Old French berfrey (changed to have an l by association with bell), from Middle High German  bërcvrit / bërvrit , possibly from late Latin berefredus, borrowed from Germanic *bergfrid. (Wiktionary)