mitt

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

• noun A type of glove that extends over the hand but only partially covers the fingers.
• noun A mitten.
• noun Baseball A large, padded, protective leather glove, usually with one sheath for the thumb and one undivided sheath for the remaining fingers, used by catchers and first basemen.
• noun Slang A hand or fist.

from The Century Dictionary.

• noun Same as mitten.
• noun A sort of glove without fingers, or with very short fingers.
• noun Something resembling a mitt.

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

• noun A mitten; also, a covering for the wrist and hand and not for the fingers, usually worn by women.
• noun (Baseball) A large glove, usually made of leather or similar material, with differing degrees of padding and usually some form of webbing in the large space between the thumb insert and the insert for the index finger; a baseball glove. It is used to assist in catching the baseball. The catcher's mitt has more padding and less webbing.
• noun A hand; -- used mostly in slang expressions

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

• noun A mitten
• noun An oversized, protective glove such as an oven mitt or a baseball mitt.
• noun informal, especially in plural A hand.

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

• noun the (prehensile) extremity of the superior limb
• noun the handwear used by fielders in playing baseball