biscuit

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A small cake of shortened bread leavened with baking powder or soda.
• noun A thin, crisp cracker.
• noun A cookie.
• noun A thin, often oblong, waferlike piece of wood, glued into slots to connect larger pieces of wood in a joint.
• noun A pale brown.
• noun Clay that has been fired once but not glazed.

from The Century Dictionary.

• noun A kind of hard, dry bread, consisting of flour, water or milk, and salt, and baked in thin flat cakes. The name is also extended to similar articles very variously made and flavored. See cracker.
• noun A small, round, soft cake made from dough raised with yeast or soda, sometimes shortened with lard, etc.
• noun In ceramics, porcelain, stoneware, or pottery after the first baking, and before the application of the glaze. Formerly bisque.

from the GNU version of the Collaborative International Dictionary of English.

• noun A kind of unraised bread, of many varieties, plain, sweet, or fancy, formed into flat cakes, and bakes hard.
• noun A small loaf or cake of bread, raised and shortened, or made light with soda or baking powder. Usually a number are baked in the same pan, forming a sheet or card.
• noun Earthen ware or porcelain which has undergone the first baking, before it is subjected to the glazing.
• noun (Sculp.) A species of white, unglazed porcelain, in which vases, figures, and groups are formed in miniature.
• noun an alimentary preparation consisting of matters extracted from meat by boiling, or of meat ground fine and combined with flour, so as to form biscuits.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A cookie.
• noun A small bread usually made with baking soda, similar in texture to a scone, but usually not sweet.
• noun A form of unglazed earthenware.
• noun nautical The "bread" formerly supplied to naval ships; made with very little water, kneaded into flat cakes and slowly baked; often infested with weevils.
• noun A light brown colour.
• noun woodworking An thin oval wafer of wood or other material inserted into mating slots on pieces of material to be joined to provide gluing surface and strength in shear.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun any of various small flat sweet cakes (`biscuit' is the British term)
• noun small round bread leavened with baking-powder or soda