thin is on the Basic English 850 List.
thick - thin - thing

Pronunciation

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Adjective

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Positive
thin

Comparative
thinner

Superlative
thinnest

 
These flowers are thin.
  1. If something is thin, there's a short distance from one side to the other.
    I can hear the people in the other room because the wall is thin.
    The man was very tall and thin as a stick.
  2. If something is thin it doesn't have a lot of stuff in it.
    The soup is too thin. It needs more flavour.
    His hair is quite thin on top.

Synonyms

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Antonyms

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Plain form
thin

Third-person singular
thins

Past tense
thinned

Past participle
thinned

Present participle
thinning

  1. (transitive & intransitive) If something thins, there is less of it.
    After the show, the crowd thinned out quickly and only a few people stayed.
    My hair started thinning when I was 25.
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