Word.ws English Dictionary

thinner

Syllables: thin·ner/ˈθɪnə(ɹ)/US/ˈθɪnɚ/

thinner is the comparative form of thin.

Noun

thinner (plural thinners)

  1. A liquid substance used to thin the consistency of another liquid.
    • Turpentine or mineral spirits can be used as a thinner for oil-based paints.
  2. Something that thins or thins out (another thing).
    • Pomegranate juice and exercise are great natural blood thinners.
    • The new type of mechanical thinner allowed thinning of peach blossoms to be completed earlier.

Meaning of thin

Adjective

thin (comparative thinner, superlative thinnest)

  1. Having little thickness or extent from one surface to its opposite.
    • thin plate of metal; thin paper; thin board; thin covering
    Synonyms:
    narrow
  2. Very narrow in all diameters; having a cross section that is small in all directions.
    • thin wire; thin string
    Synonyms:
    twiggy, fine
  3. Having little body fat or flesh; slim; slender; lean; gaunt.
    • thin person
    Synonyms:
    reedy
  4. Of low viscosity or low specific gravity.
    • Water is thinner than honey.
    Synonyms:
    runny
  5. Scarce; not close, crowded, or numerous; not filling the space.
    • The trees of a forest are thin; the corn or grass is thin.
  6. Describing a poorly played golf shot where the ball is struck by the bottom part of the club head. See fat, shank, toe.

See all 17 meanings of thin

Forms of thinner

pluralthinners

Origin of thinner

From thin + -er.

Words formed from thinner

Words that rhyme with thinner

Questions about thinner

What does thinner mean?
Thinner means a liquid substance used to thin the consistency of another liquid.
What is thinner the comparative form of?
Thinner is the comparative form of thin.
What part of speech is thinner?
Thinner is a noun.
How do you pronounce thinner?
Thinner is pronounced /ˈθɪnə(ɹ)/ (UK).
What is the plural of thinner?
The plural of thinner is thinners.

Words near thinner in the dictionary

  1. thinned
  2. thinned down
  3. thinned out
  4. thinned the herd
  5. thinned up
  6. thinner
  7. thinners
  8. thinness
  9. thinnesses
  10. thinnest
  11. thinnet

Source and license

Adapted from Wiktionary: thinner (page history and authors); thin (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Vealhurl-thinner.wav.

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