noun /ˈsʌbˌsɛt/
a) With respect to another set, a set such that each of its elements is also an element of the other set.

The set of integers is a subset of the set of reals.

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

The set a, b is a both a subset and a proper subset of a, b, c while the set a, b, c is a subset of a, b, c but not a proper subset of a, b, c.

Syn: ⊂, ⊆

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