| subset [`sǝb´set] COMMUNICATIONS A telephone or other subscriber equipment connected to a communication system, such as a modem.Derived from subscriber set. MATHEMATICS 1. A subset A of a set B is a set all of whose elements are included in B. 2. A fuzzy set A is a subset of a fuzzy set B if, for every element x, the value of the membership function of A at x is equal to or less than the value of the membership function of B at x. |