from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A set contained within a set.

from The Century Dictionary.

  • noun In mathematics, a proper part or the whole of the set: thus, a subset of S is a set every element of which belongs to S.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun set theory With respect to another set, a set such that each of its elements is also an element of the other set.
  • noun A group of things or people, all of which are in a specified larger group.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a set whose members are members of another set; a set contained within another set


from Wiktionary, Creative Commons Attribution/Share-Alike License

From sub- +‎ set


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  • A set in a set *thumbsup*

    May 20, 2009

  • I like to sit and watch the subset by the ⊂.

    October 19, 2010

  • Bilby, I hope you get over your code.

    October 19, 2010