from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Having a surface free from irregularities, roughness, or projections; even. See Synonyms at level.
  • adj. Having a fine texture: a smooth fabric.
  • adj. Free from hair, whiskers, or stubble: felt his smooth cheek after the close shave.
  • adj. Having a short dense flat coat. Used of dogs.
  • adj. Having an even consistency: a smooth pudding.
  • adj. Having an even or gentle motion or movement: a smooth ride.
  • adj. Having no obstructions or difficulties: a smooth operation.
  • adj. Serene: a smooth temperament.
  • adj. Bland: a smooth wine.
  • adj. Ingratiatingly polite and agreeable.
  • adj. Having no grossness or coarseness in dress or manner.
  • transitive v. To make (something) even, level, or unwrinkled.
  • transitive v. To rid of obstructions, hindrances, or difficulties.
  • transitive v. To soothe or tranquilize; make calm.
  • transitive v. To make less harsh or crude; refine.
  • intransitive v. To become smooth.
  • n. The act of smoothing.
  • n. A smooth surface or part.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Having a texture that lacks friction. Not rough.
  • adj. Without difficulty, problems, or unexpected consequences or incidents.
  • adj. bland; glib
  • adj. suave; sophisticated
  • adj. natural; unconstrained
  • adj. unbroken
  • adj. placid, calm.
  • adj. Lacking projections or indentations; not serrated.
  • adj. Not grainy; having an even texture.
  • adj. Having a pleasantly rounded flavor; neither rough nor astringent.
  • adj. Having derivatives of all finite orders at all points within the function’s domain.
  • adj. Lacking marked aspiration.
  • adv. Smoothly.
  • n. Something which is smooth or easy.
  • n. A smoothing action.
  • n. A domestic animal having a smooth coat.
  • n. A member of an anti-hippie fashion movement in 1970s Britain.
  • n. The analysis obtained through a smoothing procedure.
  • v. To make smooth.
  • v. To capture important patterns in the data, while leaving out noise.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Having an even surface, or a surface so even that no roughness or points can be perceived by the touch; not rough
  • adj. Evenly spread or arranged; sleek.
  • adj. Gently flowing; moving equably; not ruffled or obstructed.
  • adj. Flowing or uttered without check, obstruction, or hesitation; not harsh; voluble; even; fluent.
  • adj. Bland; mild; smoothing; fattering.
  • adj. Causing no resistance to a body sliding along its surface; frictionless.
  • adv. Smoothly.
  • n. The act of making smooth; a stroke which smooths.
  • n. That which is smooth; the smooth part of anything.
  • intransitive v. To flatter; to use blandishment.
  • transitive v. To make smooth; to make even on the surface by any means
  • transitive v. To free from obstruction; to make easy.
  • transitive v. To free from harshness; to make flowing.
  • transitive v. To palliate; to gloze.
  • transitive v. To give a smooth or calm appearance to.
  • transitive v. To ease; to regulate.

from The Century Dictionary and Cyclopedia

  • Having a surface so uniform that the eye and the touch do not readily detect any projections or irregularities in it; not rough; of water, not ruffied, or not undulating.
  • Free from hair: as, a smooth face.
  • Free from lumps: especially noting flour, starch, and the like.
  • Not harsh; not rugged; even; harmonious.
  • Using pleasing or euphonious language.
  • In Greek grammar, free from aspiration; not rough: as, a smooth mute; the smooth breathing.
  • Bland; mild; soothing; insinuating; wheedling: noting persons or speech, etc.
  • Free from anything disagreeable or unpleasant.
  • Unruffled; calm; even; complaisant: as, a smooth temper.
  • Without jolt, jar, or shock; even: as, smooth sailing; smooth driving.
  • Gentle; mild; placid.
  • Free from astringency, tartness, or any stinging or titillating character; soft to the nerves of taste: used especially of spirit.
  • In zoology, not rough, as an unsculptured surface, or one without visible elevations (as granules, points, papillæ, and nodes) or impressions (as striæ, punctures, and foveæ), though it may be thinly clothed with hairs or minute scales.
  • In botany, either opposed to scabrous (that is, not rough), or equivalent to glabrous (that is, not pubescent): the former is the more correct sense.
  • Synonyms Plain, level, polished.
  • Voluble, fluent.
  • Oily.
  • n. The act of smoothing.
  • n. That which is smooth; the smooth part of anything; a smooth place.
  • n. Specifically, a field or plat of grass.
  • To make smooth; make even on the surface by any means: as, to smooth a board with a plane; to smooth cloth with an iron.
  • To free from obstruction; make easy; remove, as an obstruction or difficulty.
  • To free from harshness; make flowing.
  • To palliate; soften.
  • To calm; mollify; allay.
  • To make agreeable; make flattering.
  • To utter agreeably; hence, to free from blame; exonerate.
  • To modify (a given series of values) so as to remove irregularities.
  • To become smooth.
  • To repeat flattering or wheedling words.
  • In old music, same as plain, 16.
  • Numerical methods, in which the means are taken of successive pairs of observations and again the means of successive means. This process may be repeated indefinitely, and is known as Bloxaming or Bloxam's method. An analogous method, but one more nearly in accord with the precepts of the laws of chance, is embodied in the following rule, devised by Dr. Galle of Breslau, for combining together seven consecutive daily means a ……. g into one value for the median date :
  • This formula can be rearranged so as to reduce the whole process of computation to a simple system of summing and halving.

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

  • v. make smooth or smoother, as if by rubbing
  • adj. having a surface free from roughness or bumps or ridges or irregularities
  • v. make (a surface) shine
  • adj. smooth and unconstrained in movement
  • adj. of the margin of a leaf shape; not broken up into teeth
  • v. free from obstructions
  • adj. (music) without breaks between notes; smooth and connected
  • adj. lacking obstructions or difficulties
  • n. the act of smoothing
  • adj. of motion that runs or flows or proceeds without jolts or turbulence
  • adj. smoothly agreeable and courteous with a degree of sophistication
  • adj. (of a body of water) free from disturbance by heavy waves


from The American Heritage® Dictionary of the English Language, 4th Edition

Middle English smothe, from Old English smōth.

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Middle English smoothe, smothe, smethe, from Old English smōþ, smōþe ("smooth, serene, calm, unruffled") and Old English smēþe ("smooth, polished, soft, without roughness or inequalities of surface, without discomfort or annoyance, suave, agreeable, avoiding offence, not irritating, not harsh, melodious, harmonious, lenitive"), both from Proto-Germanic *smanþaz, *smanþiz (“smooth, soft”), of unknown origin. Cognate with Scots smuith ("smooth"), Low German smode, smoede, smoe ("smooth"), Low German smödig ("smooth, malleable, ductile").


  • I remember rightly, all her prizes were won in light winds or smooth water; and though I do not believe we could do anything with her in a staggering whole-sail breeze in _smooth_ water, I fancy we could give a good account of her in a Channel match.

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  • As he scrambles to his feet, all his Latin smooth is gone.

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  • When the term smooth is used in this sense, Smith said it means there is very little on the slope that will act to anchor the snow in place, like trees and rocks.

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  • He said his party is still committed to what he described as a smooth, full implementation of the rest of the provisions of the 2005 Comprehensive Peace Agreement CPA.

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  • Officials who provided details of how it all unfolded concentrated Friday on what they described as the smooth integration of the administration's law enforcement, intelligence and diplomatic teams in tracking the Russian agents and turning the situation into a national security victory rather than a source of political and public concern and potential criticism.

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  • Buy the chunky kind, don't buy the smooth, the smooth is also for soccer players, credit card consultants, and guys that masturbate to Survivor and other unwatchable reality-based television shows.

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  • It must write in smooth lines of black, not catch on the page.


  • The place where we are joined is a secret place for Hattie and me, especially since everyone always wants to look at it — a bone hinge covered in smooth skin, our spines locked together at the base.

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  • The lead characters this time around still seem to Lightning McQueen and Mater, the tow truck voiced by Larry the Cable Guy, with new addition Finn McMissile, an Aston Martin smooth-looking James Bond-type.

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  • This change resulted in smooth sailing for the Norwegian bulk carrier, Nordic Barents.

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