Roughness

//ˈɹʌf.nəs// noun

noun ·Common ·High school level

Definitions

Noun
  1. 1
    The property of being rough, coarseness. countable, uncountable

    "The roughness of the road made me wonder if my car would fall apart."

  2. 2
    harsh or severe speech or behavior wordnet
  3. 3
    Something that is rough; a rough spot. countable, uncountable

    "A variety of suitable methods for surface inspection are available to detect topographical defects induced by surface roughnesses such as scratches, digs, inclusions and spatters."

  4. 4
    an unpolished unrefined quality wordnet
  5. 5
    Roughage; coarse fodder. US, countable, uncountable

    "With this latter implement, the corn stalk fodder, shucks, oats, hay and other "roughness" may be finely cut up[…]"

Show 7 more definitions
  1. 6
    a texture of a surface or edge that is not smooth but is irregular and uneven wordnet
  2. 7
    Abundance, especially of food. Scotland, countable, uncountable
  3. 8
    the quality of being harsh or rough or grating to the senses wordnet
  4. 9
    A measure of how rough something is, such as a surface countable

    "The surface roughness was low."

  5. 10
    the formation of small pits in a surface as a consequence of corrosion wordnet
  6. 11
    rowdy behavior wordnet
  7. 12
    used of the sea during inclement or stormy weather wordnet

Example

More examples

"In materials science, asperity refers to the unevenness, roughness or ruggedness of a material."

Etymology

Inherited from Middle English roughnes /roughnesse. By surface analysis, rough + -ness. Compare Old English hrēohnes (“roughness”).

Related phrases

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.