n. The oral opening or ingestive aperture of an animal, of whatever character and wherever situated; the os, or oral end of the alimentary canal or digestive system.n. Specifically — The human mouth regarded as the channel of vocal utterance.n. The interior hollow of the mouth; the buccal cavity: as, inflammation of the mouth and throat.n. The exterior opening or orifice of the mouth; the lips: as, a well-formed mouth; a kiss on the mouth.n. In entomology, the mouth-parts collectively; the oral organs or appendages which are visible externally: as, the trophi of a mandibulate mouth.n. Anything resembling a mouth in some respect.n. The part of a river or other stream where its waters are discharged into the ocean or any large body of water; a conformation of land resembling a river-mouth.n. The opening of a vise between its cheeks, chops, or jaws.n. In fortification, the interior opening of an embrasure. It may be either rectangular or trapezoidal in form. Some military writers call this opening the throat of the embrasure, and apply the term mouth to the exterior opening. See embrasure.n. In an organ-pipe, the opening in the side of the pipe above the foot, between the upper and the lower lip. See pipe.n. In ceramics, a name given to one of the fireplaces of a pottery-kiln. The kilns for firing the biscuit have several of these mouths built against them externally, and a flue from each mouth leads the flames to a central opening, where they enter the oven.n. The cross-bar of a bridle-bit, uniting the branches or the rings as the case may be.n. A principal speaker; one who utters the common opinion; an oracle; a mouthpiece.n. Cry; voice.n. Flavor; taste in the mouth: said of beer.n. See the adjectives.To utter.To utter with a voice affectedly big or swelling, or with more regard to sound than to sense.To touch, press, or seize with the mouth or lips; take into the mouth; mumble; lick.To reproach; insult.To speak with a full, round, or loud voice; speak affectedly; vociferate; rant: as, a mouthing actor.To join mouths; kiss.To make a mouth; make a wry face; grimace.n. In transverse flutes, the edge of a mouth-hole. See mouth-hole.n. In metallurgy, the opening through which a furnace is charged with fuel, ore, etc.n. In mining, a mine entrance.