subsets

/S AH1 B S EH0 T S/
noun
  1. 1

    (of a set S) A set A such that every element of A is also an element of S.

    โ€œThe set \lbrace a, b\rbrace is a both a subset and a proper subset of \lbrace a, b, c\rbrace while the set \lbrace a, b, c\rbrace is a subset of \lbrace a, b, c\rbrace but not a proper subset of \lbrace a, b, c\rbrace.โ€

  2. 2

    A group of things or people, all of which are in a specified larger group.

    โ€œWe asked a subset of the population of the town for their opinion.โ€

verb
  1. 1

    To take a subset of.

  2. 2

    To extract only the portions of (a font) that are needed to display a particular document.

Source: https://en.wiktionary.org/wiki/subset, https://en.wiktionary.org/wiki/subsets