stool

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

• noun A backless and armless single seat supported on legs or a pedestal.
• noun A low bench or support for the feet or knees in sitting or kneeling, as a footrest.
• noun A toilet seat; a commode.
• noun Evacuated fecal matter.
• noun A stump or rootstock that produces shoots or suckers.
• noun A shoot or growth from such a stump or rootstock.
• intransitive verb Botany To send up shoots or suckers.
• intransitive verb To evacuate the bowels; defecate.
• intransitive verb Slang To act as a stool pigeon.

from The Century Dictionary.

• noun A seat or chair; now, in particular, a seat, whether high or low, consisting of a piece of wood mounted usually on three or four legs, and without a back, intended for one person; also, any support of like construction used as a rest for the feet, or for the knees when kneeling.
• noun The seat of a bishop; a see.
• noun Same as ducking-stool.
• noun The seat used in easing the bowels; hence, a fecal evacuation; a discharge from the bowels.
• noun A frame for tapestry-work.
• noun The root or stump of a timber-tree, or of a bush, cane, grass, etc., which throws up shoots; also, the cluster of shoots thus produced.
• noun The mother plant from which young plants are propagated by the process of layering.
• noun Nautical: A small channel in the side of a vessel for the deadeyes of the backstays.
• noun An ornamental block placed over the stem to support a poop-lantern.
• noun A movable pole or perch to which a pigeon is fastened as a lure or decoy for wild birds. See the extract under stool-pigeon, 1.
• noun Hence A stool-pigeon; also, a decoy-duck.
• noun Material spread on the bottom for oysterspat to cling to; set, either natural or artificial. See Cultch.
• noun (See also camp-stool, footstool, night-stool, piano-stool.)
• To throw up shoots from the root, as a grass or a grain-plant; form a stool. See stool, n., 6.
• To decoy duck or other fowl by means of stools.
• To be decoyed; respond to a decoy.
• To evacuate the bowels.
• To plow; cultivate.
• noun In wooden ships, one of the pieces of plank bolted to the quarters for the purpose of forming and erecting the galleries; also, one of the ornamental blocks for the poop lanterns to stand on abaft.
• noun In iron ship-building, a small foundation or seating for the support of some part of the machinery, as the shaft-bearings, pumps, etc.

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

• noun (Hort.) A plant from which layers are propagated by bending its branches into the soil.
• intransitive verb (Agric.) To ramfy; to tiller, as grain; to shoot out suckers.
• noun A single seat with three or four legs and without a back, made in various forms for various uses.
• noun A seat used in evacuating the bowels; hence, an evacuation; a discharge from the bowels.
• noun United States A stool pigeon, or decoy bird.
• noun (Naut.) A small channel on the side of a vessel, for the dead-eyes of the backstays.
• noun A bishop's seat or see; a bishop-stool.
• noun A bench or form for resting the feet or the knees; a footstool.
• noun Local, U.S. Material, such as oyster shells, spread on the sea bottom for oyster spat to adhere to.
• noun (Arch.) the flat piece upon which the window shuts down, and which corresponds to the sill of a door; in the United States, the narrow shelf fitted on the inside against the actual sill upon which the sash descends. This is called a window seat when broad and low enough to be used as a seat.
• noun [Scot.] the cuttystool.
• noun a pigeon used as a decoy to draw others within a net; hence, a person used as a decoy for others.

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

• noun A seat for one person without a back or armrest.
• noun A footstool.
• noun Feces; excrement.
• noun archaic A decoy.
• noun Scotland A seat; a seat with a back; a chair.
• noun Scotland (literally and figuratively) Throne.
• noun obsolete A seat used in evacuating the bowels; a toilet.