UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˈsmuːð/US:USA pronunciation: IPA and respellingUSA pronuncation: IPA/smuð/ ,USA pronunciation: respelling(smo̅o̅ᵺ)

Inflections of 'smooth' (adjadjective: Describes a noun or pronoun--for example, "a tall girl," "an interesting book," "a big house."):
adj comparative
adj superlative

WordReference Random House Learner's Dictionary of American English © 2020
smooth /smuð/USA pronunciation   adj.,  -er, -est, adv., v. 
  1. not rough;
    having an even surface:a smooth road.
  2. generally flat, such as a calm sea.
  3. Biologyfree from hairs or a hairy growth:a smooth cheek.
  4. free from lumps, as a sauce:smooth gravy.
  5. allowing or having an even, uninterrupted movement:a smooth ride.
  6. free from problems or difficulties:a smooth day at the office.
  7. elegant, easy, or polished:a smooth manner with difficult clients.
  8. ingratiatingly polite;
    suave:a smooth talker.
  9. free from harshness;
    bland or mellow, such as wine.

  1. in a smooth manner;
    smoothly:[often: used before another word to form an adjective]a smooth-running car.

  1. Buildingto make the surface of (something) smooth, as by scraping, planing, pressing, etc.: [+ object]to smooth the floorboards with sandpaper before polishing them.[~ (+ off/out) + object]He smoothed (off) his jacket.[+ object (+ out)]He smoothed his jacket (out).
  2. to remove (wrinkles or the like) from something: [+ object + off (+ object)]He smoothed the wrinkles off (his jacket).[+ off/away + object]He smoothed off the wrinkles from his jacket.
  3. smooth over, to make seem less severe or disagreeable: [+ over + object]smoothed over the difficulties and got the two sides talking again.[+ object + over]to smooth them over.
smooth•ly, adv. 
smooth•ness, n. [uncountable]

WordReference Random House Unabridged Dictionary of American English © 2020
smooth  (smo̅o̅ᵺ),USA pronunciation adj.,  -er, -est, adv., v., n. 
  1. free from projections or unevenness of surface;
    not rough:smooth wood; a smooth road.
  2. generally flat or unruffled, as a calm sea.
  3. Biologyfree from hairs or a hairy growth:a smooth cheek.
  4. of uniform consistency;
    free from lumps, as a batter, sauce, etc.
  5. free from or proceeding without abrupt curves, bends, etc.:a smooth ride.
  6. allowing or having an even, uninterrupted movement or flow:smooth driving.
  7. easy and uniform, as motion or the working of a machine.
  8. having projections worn away:a smooth tire casing.
  9. free from hindrances or difficulties:a smooth day at the office.
  10. Metallurgynoting a metal file having the minimum commercial grade of coarseness for a single-cut file. Cf.  dead-smooth. 
  11. undisturbed, tranquil, or equable, as the feelings, temper, etc.;
    serene:a smooth disposition.
  12. elegant, easy, or polished:smooth manners.
  13. ingratiatingly polite or suave:That salesman is a smooth talker.
  14. free from harshness, sharpness, or bite;
    bland or mellow, as cheese or wine.
  15. not harsh to the ear, as sound:the smooth music of a ballroom dance band.
  16. Phoneticswithout aspiration.

  1. in a smooth manner;

  1. Buildingto make smooth of surface, as by scraping, planing, or pressing.
  2. to remove (projections, ridges, wrinkles, etc.) in making something smooth (often fol. by away or out).
  3. to free from difficulties.
  4. to remove (obstacles) from a path (often fol. by away).
  5. to make more polished, elegant, or agreeable, as wording or manners.
  6. to tranquilize, calm, or soothe (a person, the feelings, etc.).
  7. Mathematicsto simplify (an expression) by substituting approximate or certain known values for the variables.
  8. smooth over, to make seem less severe, disagreeable, or irreconcilable;
    mitigate:He smoothed over my disappointment with kind words.

  1. act of smoothing:She adjusted the folds with a smooth of her hand.
  2. something that is smooth;
    a smooth part or place:through the rough and the smooth.
smootha•ble, adj. 
smoother, n. 
smoothly, adv. 
smoothness, n. 
  • bef. 1050; (adjective, adjectival) Middle English smothe, late Old English smōth; compare Middle English smethe, Old English smēthe smooth; cognate with Old Saxon smōthi; (verb, verbal) late Middle English smothen, derivative of the adjective, adjectival; replacing Middle English smethen, Old English smēth(i)an
    • 1.See corresponding entry in Unabridged glossy, polished, even, flat. See  level. 

Collins Concise English Dictionary © HarperCollins Publishers::
smooth /smuːð/ adj
  1. resting in the same plane; without bends or irregularities
  2. silky to the touch: smooth velvet
  3. lacking roughness of surface; flat
  4. tranquil or unruffled: smooth temper
  5. lacking obstructions or difficulties
  6. suave or persuasive, esp as suggestive of insincerity
  7. (in combination): smooth-tongued
  8. (of the skin) free from hair
  9. of uniform consistency: smooth batter
  10. not erratic; free from jolts: smooth driving
  11. not harsh or astringent: a smooth wine
  12. having all projections worn away: smooth tyres
  13. without preliminary or simultaneous aspiration
  14. (of a plane, surface, etc) regarded as being frictionless
  1. in a calm or even manner; smoothly
vb (mainly tr)
  1. (also intr) often followed by down: to make or become flattened or without roughness or obstructions
  2. often followed by out or away: to take or rub (away) in order to make smooth: she smoothed out the creases in her dress
  3. to make calm; soothe
  4. to make easier: smooth his path
  1. the smooth part of something
  2. the act of smoothing
  3. the side of a racket on which the binding strings form a continuous line

See also smooth overEtymology: Old English smōth; related to Old Saxon māthmundi gentle-minded, smōthi smooth

ˈsmoother n ˈsmoothly adv ˈsmoothness n
'smooth' also found in these entries:
Collocations: smooth the [transition, path, way], is smooth to the touch, smooth the [edges, corners], more...

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