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.
The early submission process was created by the state Legislature in 2019, as part of Senate Bill 330, to allow developers to apply with just a subset of project information while simultaneously freezing development standards. Jennifer Van Grove, San Diego Union-Tribune, 1 Feb. 2026 Some 2,500 dogs from 212 breeds and varieties (subsets of breeds) are signed up to compete. Jennifer Peltz, Chicago Tribune, 1 Feb. 2026 People will also be asking who has a building big enough for our subset group of archivists documenting, artists making things, community organizers gathering, professors panicking, singers singing, parents guarding in order to gather us together again. Angela Pelster, Literary Hub, 29 Jan. 2026 Rare earths are a subset of critical minerals that are crucial inputs in strategic industries like defense, robotics, electric vehicles and semiconductor manufacturing. Spencer Kimball, CNBC, 26 Jan. 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

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Cite this Entry

“Subset.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/subset. Accessed 6 Feb. 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

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