# subset

## English

From sub- +‎ set

### Pronunciation

• (UK) IPA(key): /ˈsʌbˌsɛt/
•  Audio (US) (file)

### Noun

subset (plural subsets)

1. (set theory) 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.
The set ${\displaystyle {a,b}}$ is a both a subset and a proper subset of ${\displaystyle {a,b,c}}$ while the set ${\displaystyle {a,b,c}}$ is a subset of ${\displaystyle {a,b,c}}$ but not a proper subset of ${\displaystyle {a,b,c}}$.
2. 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.

### Verb

subset (third-person singular simple present subsets, present participle subsetting, simple past and past participle subsetted)

1. (transitive) To take a subset of.
2. (transitive, computing, typography) To extract only the portions of (a font) that are needed to display a particular document.