thin - definition and synonyms

verb 

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/θɪn/
present tense
I/you/we/theythin
he/she/itthins
present participlethinning
past tensethinned
past participlethinned
  1. 1

    thin

    or

    thin down

    [transitive] to make something smaller in number, amount, or size

    Sales have decreased and we’ve decided to thin our workforce.

    Police thinned down the crowd.

    1. a.
      [intransitive] to become smaller in number, amount, or size
  2. 2

    thin

    or

    thin out

    [transitive] to remove plants, leaves, trees etc so that they do not fill an area or space completely
     Synonyms and related words
  3. 3
    [intransitive] if someone’s hair thins, they gradually lose the hair from their head

    a man with grey thinning hair

     Synonyms and related words
  4. 4
    [transitive] to make a thick liquid become less thick by adding water or another liquid to it