mouththe human mouth and its contiguous structuresA. hard palateB. lipsC. teethD. salivary glandsE. tracheaF. esophagusG. soft palateH. tonguemouth (mouth)n. pl. mouths (mouthz) 1. a. The body opening through which an animal takes in food.b. The cavity lying at the upper end of the digestive tract, bounded on the outside by the lips and inside by the oropharynx and containing in humans and certain other vertebrates the tongue, gums, and teeth.c. This cavity regarded as the source of sounds and speech.d. The opening to any cavity or canal in an organ or a bodily part.2. a. The part of the lips visible on the human face.b. A pout, grimace, or similar expression: made a mouth when the teacher turned away.3. a. A person viewed as a consumer of food: has three mouths to feed at home.b. A spokesperson; a mouthpiece: acts as the mouth of the organization.4. a. Utterance; voice: gave mouth to her doubts.b. A tendency to talk excessively or unwisely: is known mainly for his mouth.c. Impudent or vulgar talk: Watch your mouth.5. An opening, especially: a. The part of a stream or river that empties into a larger body of water.b. The entrance to a harbor, canyon, valley, or cave.c. The opening through which a container is filled or emptied.d. The muzzle of a gun.e. The opening between the jaws of a vise or other holding or gripping tool.f. An opening in the pipe of an organ.g. The opening in the mouthpiece of a flute across which the player blows.v. (mouth) mouthed, mouth·ing, mouths v.tr.1. To speak or pronounce, especially:a. To declare in a pompous manner; declaim: mouthing his opinions of the candidates.b. To utter without conviction or understanding: mouthing empty compliments.c. To form soundlessly: I mouthed the words as the others sang.2. To take in or touch with the mouth: Small children tend to mouth their toys.v.intr.1. To orate affectedly; declaim.2. To grimace.Phrasal Verb: mouth off Slang 1. To express one’s opinions or complaints in a loud, indiscreet manner.2. To speak impudently; talk back.Idiom: down in/at the mouth Discouraged; sad; dejected.[Middle English, from Old English m?th; see men- in Indo-European roots.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.mouth n, pl mouths (ma?ðz) 1. (Anatomy) the opening through which many animals take in food and issue vocal sounds2. (Anatomy) the system of organs surrounding this opening, including the lips, tongue, teeth, etc3. (Anatomy) the visible part of the lips on the face. 4. (Cookery) a person regarded as a consumer of food: four mouths to feed. 5. verbal expression (esp in the phrase give mouth to)6. (Linguistics) a particular manner of speaking: a foul mouth. 7. informal boastful, rude, or excessive talk: he is all mouth. 8. (Physical Geography) the point where a river issues into a sea or lake9. (Ceramics) the opening of a container, such as a jar10. (Physical Geography) the opening of or place leading into a cave, tunnel, volcano, etc11. (Horse Training, Riding & Manège) that part of the inner lip of a horse on which the bit acts, esp when specified as to sensitivity: a hard mouth. 12. (Instruments) music the narrow slit in an organ pipe13. (Mechanical Engineering) the opening between the jaws of a vice or other gripping device14. a pout; grimace15. (Linguistics) by word of mouth orally rather than by written means16. down in the mouth down at the mouth in low spirits17. have a big mouth open one’s big mouth informal to speak indiscreetly, loudly, or excessively18. keep one’s mouth shut to keep a secret19. put one’s money where one’s mouth is to take appropriate action to support what one has said20. put words into someone’s mouth a. to represent, often inaccurately, what someone has saidb. to tell someone what to say21. run off at the mouth informal to talk incessantly, esp about unimportant matters vb 22. to speak or say (something) insincerely, esp in public 23. (tr) to form (words) with movements of the lips but without speaking 24. (Horse Training, Riding & Manège) (tr) to accustom (a horse) to wearing a bit 25. (Physiology) (tr) to take (something) into the mouth or to move (something) around inside the mouth 26. (usually foll by: at) to make a grimace [Old English m?th; compare Old Norse muthr, Gothic munths, Dutch mond] mouther nCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014mouth (n. ma??; v. ma?ð) n., pl. mouths (moutz) 1. the opening through which an animal takes in food. 2. a person or animal dependent on someone for sustenance: another mouth to feed. 3. the oral opening or cavity considered as the source of vocal utterance. 4. utterance or expression: to give mouth to one’s thoughts. 5. talk, esp. loud, empty, or boastful talk. 6. disrespectful talk or language. 7. a grimace made with the lips. 8. an opening leading out of or into any cavity or hollow place or thing. 9. the outfall at the lower end of a river or stream, where flowing water is discharged, as into a larger body of water. 10. the opening between the jaws of a vise or the like. 11. the lateral hole of an organ pipe. 12. the lateral blowhole of a flute. v.t. 13. to utter in a sonorous or pompous manner, or with excessive mouth movements. 14. to form (a word, sound, etc.) silently or indistinctly in one’s mouth. 15. to put or take into the mouth, as food. 16. to press, rub, or chew at with the mouth or lips. v.i. 17. to speak sonorously and oratorically, or with excessive mouth movement. 18. to grimace with the lips. 19. mouth off, Slang. a. to talk back; sass. b. to express one’s opinions in a forceful or uninhibited manner. Idioms: down in or at the mouth, dejected. [before 900; Middle English; Old English m?th; c. Old Frisian, Old Saxon m?th, mund, Old High German munt, Old Norse munnr, m?thr, Gothic munths] mouth?er, n. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.