subset

noun

sub·​set ˈsəb-ˌset How to pronounce subset (audio)
1
: a set each of whose elements is an element of an inclusive set
2
: division, portion
a subset of our community

Examples of subset in a Sentence

The set {1,2,3} is a subset of the set {1,2,3,4,5}. Only a small subset of the patients in the study experienced these side effects.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
During a recent focus group of twenty Gen Z Republicans conducted by the Manhattan Institute, a conservative think tank, a subset of participants were asked to share their thoughts on Hitler. Antonia Hitchens, New Yorker, 6 Apr. 2026 Instead of first focusing on breadth of coverage, the startup aims to create deep liquidity in a subset of currencies before expanding outward. Ben Weiss, Fortune, 26 Mar. 2026 As a result, short sellers’ focus is shifting to a subset of companies where bearish bets are still climbing. Yun Li, CNBC, 24 Mar. 2026 The subset of patients helped by the county includes people with a wide variety of illnesses. Andre Mouchard, Oc Register, 15 Mar. 2026 See All Example Sentences for subset

Word History

First Known Use

1881, in the meaning defined at sense 1

Time Traveler
The first known use of subset was in 1881

Browse Nearby Words

Cite this Entry

“Subset.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/subset. Accessed 8 Apr. 2026.

Kids Definition

subset

noun
sub·​set ˈsəb-ˌset How to pronounce subset (audio)
: a mathematical set that is a part of another mathematical set
the set of even numbers is a subset of the set of all numbers

More from Merriam-Webster on subset

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster