The term "power set" refers to a set that contains all possible subsets of a given set. There are several synonyms for power set, such as the set of all subsets, the absolute set, the set of all power sets, and the universal set. The power set is a fundamental concept in mathematics and is often used in set theory and combinatorics. It is represented by P(S) where S is the original set. Every element of a power set is itself a set, and the total number of subsets in a power set is equal to 2^n, where n is the number of elements in the original set.