thinning

/TH IH1 N IH0 NG/
verb
  1. 1

    To make thin or thinner.

  2. 2

    To become thin or thinner.

    โ€œThe crowds thinned after the procession had passed: there was nothing more to see.โ€

  3. 3

    To dilute.

  4. 4

    To remove some plants or parts of plants in order to improve the growth of what remains.

noun
  1. 1

    Process of removing plants or parts of plants to facilitate the growth of other plants

  2. 2

    Wood, leaves, or other plant parts removed during the process of thinning

  3. 3

    The action or result of reducing thickness, density, or number

adjective
  1. 1

    Becoming less thick, dense, or numerous

    โ€œthinning hairโ€

Source: https://en.wiktionary.org/wiki/thin, https://en.wiktionary.org/wiki/thinning