subset /ˈsʌbˌsɛt/noun 2verb 2forms 3 noun2 •A set A such that every element of A is also an element of S.The set of integers is a subset of the set of real numbers. •A group of things or people, all of which are in a specified larger group.We asked a subset of the population of the town for their opinion. verb2 •To take a subset of. •To extract only the portions of (a font) that are needed to display a particular document. formssubsetted · subsetting · subsets