I. ˈsəb+|- verb
Etymology: sub- + set (v.)
Scots law : sublet
II. ˈsəb+ˌ- noun
Etymology: sub- + set
: a set (as of data) that is itself an element of a larger set ; especially : a mathematical set each of whose elements is also an element of a given set
III. noun
: a smaller part : a particular aspect : portion
the science that reaches our newspapers and magazines is a small and biased subset of the interesting work done by professionals — S.J.Gould
the business universe is just a subset of the bigger cosmos — Stanley Bing