SUBSET
subset
(noun) a set whose members are members of another set; a set contained within another set
Source: WordNet® 3.1
Etymology
Noun
subset (plural subsets)
(set theory, of a set S) A set A such that every element of A is also an element of S.
The set is a both a subset and a proper subset of while the set is a subset of but not a proper subset of .
A group of things or people, all of which are in a specified larger group.
Usage notes
• (set theory)
The subset relation is denoted ⊆ (⊂ for proper subset), and one writes A ⊆ B for "A is a subset of B".
It is permissible for A to contain no elements: the empty set is a subset of every set (including itself).
Synonyms
• subclass
Antonyms
• superclass
• superset
Verb
subset (third-person singular simple present subsets, present participle subsetting, simple past and past participle subsetted)
(transitive) To take a subset of.
(transitive, computing, typography) To extract only the portions of (a font) that are needed to display a particular document.
Source: Wiktionary