knob

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

• noun A rounded protuberance.
• noun A rounded handle, as on a drawer or door.
• noun A rounded control switch or dial.
• noun A prominent rounded hill or mountain.

from The Century Dictionary.

• noun A small flock, less than 30, of ducks: an English sporting-term.
• To grow into knobs; bunch.
• To produce a knob or knobs upon.
• To free from knobs, as stone in the quarry, in rough-dressing it.
• noun A rounded projection; a protuberance; a bunch; a knop.
• noun A fleshy protuberance; a pimple.
• noun A rounded projection forming the termination of something, as of a staff: specifically, the more or less ballshaped part of the handle for a door, drawer, or the like.
• noun A prominent isolated hill; a hill generally: same as mound in Wisconsin and Iowa, and butte in the Cordilleran region. [Southern and western U. S.]
• noun In entomology, a dilated outer portion of a part. Specifically — An expanded apical portion of an insect's antenna, as in a butterfly. In Diptera, the capitulum or outer portion of the halter or balancer. The distended outer portion of a fly's proboscis.
• noun In a cannon, the spherical part at the rear end of the piece, forming the opposite extremity to the muzzle: it is a part of the cascabel. In ships' guns a breeching-loop takes the place of the knob.
• noun In architecture, specifically, a bunch of leaves, flowers, or similar ornaments, as the boss at the intersection of ribs, the end of a label or other molding, or a bunch of foliage in a capital. In this sense also called knop and knot. See cut under boss.
• noun Same as knobstick.
• noun The rudiment of a deer's antler. Compare knobber.

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

• intransitive verb obsolete To grow into knobs or bunches; to become knobbed.
• noun A hard protuberance; a hard swelling or rising; a bunch; a lump.
• noun A knoblike ornament or handle.
• noun United States A rounded hill or mountain.
• noun (Arch.) See Knop.
• noun a latch which can be operated by turning a knob, without using a key.

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

• noun A rounded protuberance, handle, or control switch.
• noun geography A prominent rounded hill.
• noun A rounded ornament on the hilt of an edged weapon; a pommel.
• noun A prominent, rounded bump along a mountain ridge.
• noun UK, New Zealand, slang A penis.
• noun slang, pejorative A contemptible person.
• noun cooking A dollop, an amount just larger than a spoonful (usually referring to butter)
• verb UK, slang, vulgar, of a man To have sex with.

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

• noun a round handle
• noun an ornament in the shape of a ball on the hilt of a sword or dagger
• noun a circular rounded projection or protuberance
• noun any thickened enlargement