Dictionary > English Dictionary > Definition, synonym and antonym of smooth
Meaning of smooth by Wiktionary Dictionary


    Alternative forms


    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” ) .


    • IPA: /smuːð/
    • Rhymes: -uːð


    smooth ( comparative smoother, superlative smoothest )

    1. Having a texture that lacks friction. Not rough.
    2. Without difficulty, problems, or unexpected consequences or incidents .
      We hope for a smooth transition to the new system .
    3. bland; glib
    4. ( of a person ) suave; sophisticated
    5. ( of an action ) natural; unconstrained
    6. ( of a motion ) unbroken
    7. ( chiefly of water ) placid, calm.
    8. ( of an edge ) Lacking projections or indentations; not serrated.
    9. ( of food or drink ) Not grainy; having an even texture.
    10. ( of a beverage ) Having a pleasantly rounded flavor; neither rough nor astringent.
    11. ( mathematics, of a function ) Having derivatives of all finite orders at all points within the function’s domain.
      • 2003, Eric W. Weisstein, CRC Concise Encyclopedia of Mathematics[11], ISBN 1584883472, page 419:
        Any ANALYTIC FUNCTION is smooth. But a smooth function is not necessarily analytic .
    12. ( linguistics, classical studies, of a vowel ) Lacking marked aspiration.




    smooth ( comparative smoother, superlative smoothest )

    1. Smoothly .


    smooth ( plural: smooths )

    1. Something which is smooth or easy.
    2. A smoothing action.
    3. A domestic animal having a smooth coat.
    4. A member of an anti-hippie fashion movement in 1970s Britain.
    5. ( statistics ) The analysis obtained through a smoothing procedure.


    smooth ( third-person singular simple present smooths present participle smoothing, simple past and past participle smoothed )

    1. To make smooth.
    2. ( statistics, image processing, digital audio ) To capture important patterns in the data, while leaving out noise.

    See also


Explanation of smooth by Wordnet Dictionary


    1. make ( a surface ) shine

    2. make smooth or smoother, as if by rubbing

    3. smooth the surface of the wood
    4. free from obstructions

    5. smooth the way towards peace negotiations
    1. ( of a body of water ) free from disturbance by heavy waves

    2. a smooth channel crossing
    3. lacking obstructions or difficulties

    4. the bill's path through the legislature was smooth and orderly
    5. smoothly agreeable and courteous with a degree of sophistication

    6. the manager pacified the customer with a smooth apology for the error
    7. smooth and unconstrained in movement

    8. a long, smooth stride
    9. having a surface free from roughness or bumps or ridges or irregularities

    10. smooth skin
      a smooth tabletop
      smooth fabric
      a smooth road
      water as smooth as a mirror
    11. of motion that runs or flows or proceeds without jolts or turbulence

    12. a smooth ride
    13. of the margin of a leaf shape

    14. without breaks between notes

    1. the act of smoothing

    2. he gave his hair a quick smooth

    Definition of smooth by GCIDE Dictionary


    1. Smooth ( smth ), a. [Compar. Smoother ( smthẽr ); superl. Smoothest.] [OE. smothe, smethe, AS. smēðe, smœðe, where ē, œ, come from an older ō; cf. LG. smöde, smöe, smödig; of uncertain origin.]
      1. Having an even surface, or a surface so even that no roughness or points can be perceived by the touch; not rough; as, “smooth glass; smooth porcelain.” Chaucer.

      The outlines must be smooth, imperceptible to the touch, and even, without eminence or cavities. Dryden.

      2. Evenly spread or arranged; sleek; as, “smooth hair”.

      3. Gently flowing; moving equably; not ruffled or obstructed; as, “a smooth stream”.

      4. Flowing or uttered without check, obstruction, or hesitation; not harsh; voluble; even; fluent.

      The only smooth poet of those times. Milton.

      Waller was smooth; but Dryden taught to join

      The varying verse, the full-resounding line. Pope.

      When sage Minerva rose,

      From her sweet lips smooth elocution flows. Gay.

      5. Bland; mild; smoothing; fattering.

      This smooth discourse and mild behavior oft

      Conceal a traitor. Addison.

      6. ( Mech. & Physics ) Causing no resistance to a body sliding along its surface; frictionless.

      ☞ Smooth is often used in the formation of self-explaining compounds; as, smooth-bodied, smooth-browed, smooth-combed, smooth-faced, smooth-finished, smooth-gliding, smooth-grained, smooth-leaved, smooth-sliding, smooth-speaking, smooth-woven, and the like.

      Syn. -- Even; plain; level; flat; polished; glossy; sleek; soft; bland; mild; soothing; voluble; flattering; adulatory; deceptive.

    2. Smooth, adv. Smoothly. Chaucer.

      Smooth runs the water where the brook is deep. Shak.

    3. Smooth, n.
      1. The act of making smooth; a stroke which smooths. Thackeray.

      2. That which is smooth; the smooth part of anything. “The smooth of his neck.” Gen. xxvii. 16.

    4. Smooth, v. t. [imp. & p. p. Smoothed ( smthd ); p. pr. & vb. n. Smoothing.] [OE. smothen, smethen, AS. smēðian; cf. LG. smöden. See Smooth, a.] To make smooth; to make even on the surface by any means; as, “to smooth a board with a plane; to smooth cloth with an iron.” Specifically: --

      To free from obstruction; to make easy.

      Thou, Abelard! the last sad office pay,

      And smooth my passage to the realms of day. Pope.

      To free from harshness; to make flowing.

      In their motions harmony divine

      So smooths her charming tones that God's own ear

      Listens delighted. Milton.

      To palliate; to gloze; as, “to smooth over a fault”.

      To give a smooth or calm appearance to.

      Each perturbation smoothed with outward calm. Milton.

      To ease; to regulate. Dryden.

    5. Smooth, v. i. To flatter; to use blandishment.

      Because I can not flatter and speak fair,

      Smile in men's faces, smooth, deceive and cog. Shak.