Meaning of SUBSET in English
/sub"set'/ , n.
1. a set that is a part of a larger set.
2. Math. a set consisting of elements of a given set that can be the same as the given set or smaller.
[ 1900-05; SUB- + SET ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012