Definition of smooth adjective from the Oxford Advanced American Dictionary

      

    smooth

     adjective
    adjective
    NAmE//smuð//
     
    (smoother, smoothest)
     
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    flat/even
  1. 1completely flat and even, without any lumps, holes, or rough areas a lotion to make your skin feel soft and smooth The water was as smooth as glass. a paint that gives a smooth, silky finish Over the years, the stone steps had worn smooth. opposite rough
  2. without lumps
  3. 2(of a liquid mixture) without any lumps Mix the flour with the milk to form a smooth paste.
  4. without problems
  5. 3happening or continuing without any problems They are introducing new measures to ensure the smooth running of the business. They could not ensure a smooth transfer of political power.
  6. movement
  7. 4even and regular, without sudden stops and starts The car's improved suspension gives you a smoother ride. The plane made a smooth landing. She swung herself over the gate in one smooth movement.
  8. man
  9. 5(often disapproving) (of people, especially men, and their behavior) very polite and pleasant, but in a way that is often not very sincere synonym smarmy I don't like him. He's far too smooth for me. He's something of a smooth operator.
  10. drink/taste
  11. 6pleasant and not bitter This coffee has a smooth, rich taste.
  12. voice/music
  13. 7nice to hear, and without any rough or unpleasant sounds
  14.  
    noun [uncountable] the smoothness of her skin They admired the smoothness and efficiency with which the business was run.
  15. Idioms
    be clear/smooth sailing
     
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    to be simple and free from trouble
    take the rough with the smooth
     
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    to accept the unpleasant or difficult things that happen in life as well as the good things
See the Oxford Advanced Learner's Dictionary entry: smooth