See more synonyms for smooth on
adjective, smooth·er, smooth·est.
  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. free 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. noting a metal file having the minimum commercial grade of coarseness for a single-cut file.Compare 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. Phonetics. without aspiration.
  1. in a smooth manner; smoothly.
verb (used with object)
  1. to make smooth of surface, as by scraping, planing, or pressing.
  2. to remove (projections, ridges, wrinkles, etc.) in making something smooth (often followed by away or out).
  3. to free from difficulties.
  4. to remove (obstacles) from a path (often followed 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. Mathematics. to simplify (an expression) by substituting approximate or certain known values for the variables.
  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.
Verb Phrases
  1. smooth over, to make seem less severe, disagreeable, or irreconcilable; allay; mitigate: He smoothed over my disappointment with kind words.

Origin of smooth

before 1050; (adj.) Middle English smothe, late Old English smōth; compare Middle English smethe, Old English smēthe smooth; cognate with Old Saxon smōthi; (v.) late Middle English smothen, derivative of the adj.; replacing Middle English smethen, Old English smēth(i)an
Related formssmooth·a·ble, adjectivesmooth·er, nounsmooth·ly, adverbsmooth·ness, nouno·ver·smooth, adjectiveo·ver·smooth·ly, adverbo·ver·smooth·ness, nounpre·smooth, verb (used with object)re·smooth, verb (used with object)un·smooth, adjectiveun·smooth·ly, adverbun·smooth·ness, nounun·smoothed, adjective

Synonyms for smooth

See more synonyms for on Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for smoothly

evenly, easily, simply, effortlessly, swimmingly, fluently, placidly

Examples from the Web for smoothly

Contemporary Examples of smoothly

Historical Examples of smoothly

  • Presently she reappeared, and with her, smoothly talking her down, came the young man.

    Meadow Grass

    Alice Brown

  • It doesn't strike you that they went off a little too smoothly, does it?'

  • This was a wide stream, smoothly hurrying, without rapids or tumult.

    The Forest

    Stewart Edward White

  • Then mix it smoothly with the yeast, and stir it into the household flour.

    The Skilful Cook

    Mary Harrison

  • His garments clung as tightly and smoothly as if he had been kneaded into them—as, indeed, he had.

    The Strolling Saint

    Raphael Sabatini

British Dictionary definitions for smoothly


  1. resting in the same plane; without bends or irregularities
  2. silky to the touchsmooth velvet
  3. lacking roughness of surface; flat
  4. tranquil or unruffledsmooth temper
  5. lacking obstructions or difficulties
    1. suave or persuasive, esp as suggestive of insincerity
    2. (in combination)smooth-tongued
  6. (of the skin) free from hair
  7. of uniform consistencysmooth batter
  8. not erratic; free from joltssmooth driving
  9. not harsh or astringenta smooth wine
  10. having all projections worn awaysmooth tyres
  11. maths (of a curve) differentiable at every point
  12. phonetics without preliminary or simultaneous aspiration
  13. gentle to the ear; flowing
  14. physics (of a plane, surface, etc) regarded as being frictionless
  1. in a calm or even manner; smoothly
verb (mainly tr)
  1. (also intr often foll by down) to make or become flattened or without roughness or obstructions
  2. (often foll by out or away) to take or rub (away) in order to make smoothshe smoothed out the creases in her dress
  3. to make calm; soothe
  4. to make easiersmooth his path
  5. electrical engineering to remove alternating current ripple from the output of a direct current power supply
  6. obsolete to make more polished or refined
  1. the smooth part of something
  2. the act of smoothing
  3. tennis squash badminton the side of a racket on which the binding strings form a continuous lineCompare rough (def. 27)
See also smooth over
Derived Formssmoothable, adjectivesmoother, nounsmoothly, adverbsmoothness, noun

Word Origin for smooth

Old English smōth; related to Old Saxon māthmundi gentle-minded, smōthi smooth
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for smoothly

1520s, "in a smooth manner, blandly," from smooth (adj.) + -ly (2). Meaning "without impediment or complications" is from 1660s.



Old English smoð "smooth, serene, calm," variant of smeðe "free from roughness, not harsh, polished; soft; suave; agreeable," of unknown origin and with no known cognates. Of words, looks, "pleasant, polite, sincere" late 14c., but later "flattering, insinuating" (mid-15c.). Slang meaning "superior, classy, clever" is attested from 1893. Sense of "stylish" is from 1922.

Smooth-bore in reference to guns is from 1812. smooth talk (v.) is recorded from 1950. A 1599 dictionary has smoothboots "a flatterer, a faire spoken man, a cunning tongued fellow." The usual Old English form was smeðe, and there is a dialectal smeeth found in places names, e.g. Smithfield, Smedley.



late Old English smoþ "to make smooth," replacing smeðan "to smooth, soften, polish; appease, soothe;" smeðian "smoothen, become smooth," from the source of smooth (adj.). Meaning "to make smooth" is c.1200. Related: Smoothed; smoothing. Middle English also had a verb form smoothen (mid-14c.).

Online Etymology Dictionary, © 2010 Douglas Harper

Idioms and Phrases with smoothly


In addition to the idioms beginning with smooth

  • smooth as silk
  • smooth over
  • smooth sailing

also see:

  • take the rough with the smooth
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.