Usually means: Irregularity in texture or surface.
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We found 26 dictionaries that define the word roughness:

General (20 matching dictionaries)
  1. roughness: Merriam-Webster
  2. roughness: Oxford Learner's Dictionaries
  3. roughness: Collins English Dictionary
  4. roughness: Vocabulary.com
  5. roughness: Wordnik
  6. roughness: Cambridge Advanced Learner's Dictionary
  7. roughness: Wiktionary
  8. Roughness, roughness: Dictionary.com
  9. Roughness (disambiguation), Roughness (psychophysics), Roughness: Wikipedia, the Free Encyclopedia
  10. Roughness: Online Plain Text English Dictionary
  11. roughness: Webster's Revised Unabridged, 1913 Edition
  12. roughness: Rhymezone
  13. Roughness: AllWords.com Multi-Lingual Dictionary
  14. roughness: Webster's 1828 Dictionary
  15. roughness: FreeDictionary.org
  16. roughness: Mnemonic Dictionary
  17. roughness: TheFreeDictionary.com
  18. Roughness: Wordnik

Business (1 matching dictionary)
  1. roughness: Legal dictionary

Computing (1 matching dictionary)
  1. roughness: Encyclopedia

Medicine (1 matching dictionary)
  1. roughness: Merriam-Webster Medical Dictionary

Miscellaneous (1 matching dictionary)
  1. roughness: Idioms

Science (1 matching dictionary)
  1. Roughness: Eric Weisstein's World of Physics

Slang (1 matching dictionary)
  1. roughness: Urban Dictionary

(Note: See rough as well.)

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Definitions from Wiktionary (roughness)

▸ noun:  The property of being rough, coarseness.
▸ noun:  Something that is rough; a rough spot.
▸ noun:  (US) Roughage; coarse fodder.
▸ noun:  (Scotland) Abundance, especially of food.
▸ noun:  (countable, engineering) A measure of how rough something is, such as a surface

Similar:
rowdyism, choppiness, crudeness, rowdiness, harshness, disorderliness, pitting, indentation, rough water, coarseness, more...

Opposite:
smoothness, smooth, polish

Types:
sandpaper, grit, jagged, uneven, bumpy, coarse, more...

Phrases:
Surface roughness, roughness length, roughness coefficient, roughness factor, hydraulic roughness, more...

Adjectives:
relative, average, certain, slight, unnecessary, little, bottom, natural, interfacial, high, low



▸ Words similar to roughness

▸ Usage examples for roughness

▸ Idioms related to roughness

▸ Wikipedia articles (New!)

▸ Popular adjectives describing roughness

▸ Words that often appear near roughness

▸ Rhymes of roughness

▸ Invented words related to roughness

Similar:
rowdyism, choppiness, crudeness, rowdiness, harshness, disorderliness, pitting, indentation, rough water, coarseness, more...

Opposite:
smoothness, smooth, polish

Types:
sandpaper, grit, jagged, uneven, bumpy, coarse, more...

Phrases:
Surface roughness, roughness length, roughness coefficient, roughness factor, hydraulic roughness, channel roughness, International roughness index, more...

Adjectives:
relative, average, certain, slight, unnecessary, little, bottom, natural, interfacial, high, low



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