hob

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

• noun A shelf or projection at the back or side of a fireplace, used for keeping food or utensils warm.
• noun A tool used for cutting the teeth of machine parts, as of a gearwheel.
• noun Chiefly British A hobgoblin, sprite, or elf.
• noun Mischievous behavior.

from The Century Dictionary.

• noun A milling-machine cutter used in forming the teeth of worm-gears.
• noun A master die; a steel punch cut to a certain design, used for making coining-dies.
• noun A countryman; a rustic; an awkward, clownish fellow.
• noun A sprite; an elf; a hobgoblin.
• noun A round stick, stake, or pin used as a mark to throw at in certain games, as in quoits or the game called hob.
• noun A boys' game in which halfpence are set on the end of a round stick (the hob), at which something (as a stone) is pitched.
• noun A hardened threaded steel mandrel for cutting a comb or chasing-tool.
• noun The nave of a wheel: same as hub, 7.
• noun A structure inserted in a fireplace to diminish its width, originally introduced when broad open fireplaces were first fitted with grates for the burning of coal; also, the level top of such a structure, forming a space upon which any thing can be set which it is desired to keep hot.
• noun The shoe of a sledge.

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

• noun The hub of a wheel. See Hub.
• noun The flat projection or iron shelf at the side of a fire grate, where things are put to be kept warm.
• noun (Mech.) A threaded and fluted hardened steel cutter, resembling a tap, used in a lathe for forming the teeth of screw chasers, worm wheels, etc.
• noun A peg, pin, or mark used as a target in some games, as an iron pin in quoits; also, a game in which such a target is used.
• noun (Zoöl.) The male ferret.
• noun obsolete A fairy; a sprite; an elf.
• noun obsolete A countryman; a rustic; a clown.

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

• noun obsolete A fairy; a sprite; an elf.
• noun obsolete A countryman; a rustic or yokel.
• noun A kind of cutting tool, used to cut the teeth of a gear.
• noun obsolete The flat projection or iron shelf at the side of a fire grate, where things are put to be kept warm.
• noun UK The top cooking surface on a cooker. It typically comprises several cooking elements (often four), also known as 'rings'.
• noun A rounded peg used as a target in several games, especially in quoits
• noun A male ferret.
• verb transitive To create (a gear) by cutting with a hob.
• verb intransitive To engage in the process of cutting gears with a hob.

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

• noun (folklore) fairies that are somewhat mischievous
• noun a hard steel edge tool used to cut gears
• noun a shelf beside an open fire where something can be kept warm
• verb cut with a hob
• noun (folklore) a small grotesque supernatural creature that makes trouble for human beings