proper subset

noun

a set that is a subset of the set, but not equal to it.

“{2, 4, 5} is a proper subset of {1, 2, 3, 4, 5}, but {1, 2, 3, 4, 5} is not.”

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Meanings

nounproper subset (plural proper subsets)

plural proper subsets

  1. mathematicsa set that is a subset of the set, but not equal to it.

    {2, 4, 5} is a proper subset of {1, 2, 3, 4, 5}, but {1, 2, 3, 4, 5} is not.

Synonyms & antonyms

Also see
properly included

Translations

Chinese Mandarin 真子集
  • 真子集 (zhēnzǐjí)a set that is a subset of but not equal to another set
Czech vlastní podmnožina
  • vlastní podmnožinaa set that is a subset of but not equal to another set
Danish ægte delmængde
  • ægte delmængdea set that is a subset of but not equal to another set
Finnish aito osajoukko
  • aito osajoukkoa set that is a subset of but not equal to another set
French sous-ensemble stricte
  • sous-ensemble strictea set that is a subset of but not equal to another set
German echte Teilmenge
  • echte Teilmengea set that is a subset of but not equal to another set
Hungarian valódi részhalmaz
  • valódi részhalmaza set that is a subset of but not equal to another set
Icelandic eiginlegt hlutmengi
  • eiginlegt hlutmengia set that is a subset of but not equal to another set
Italian sottoinsieme proprio
  • sottoinsieme proprioa set that is a subset of but not equal to another set
Swedish proper delmängd, äkta delmängd
  • proper delmängda set that is a subset of but not equal to another set
  • äkta delmängda set that is a subset of but not equal to another set
Cite this entry
APA

proper subset. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/proper%20subset

MLA

“proper subset.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/proper%20subset. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “proper subset,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/proper%20subset.

Source: proper subset on Wiktionary, CC BY-SA 4.0.