noun · control consisting of a mechanical or electrical or electronic device for making or breaking or changing the connections in a circuitelectric switchelectrical switch
noun · an event in which one thing is substituted for another“the replacement of lost blood by a transfusion of donor blood”
noun · the act of changing one thing or position for another“his switch on abortion cost him the election”
verb · change over, change around, as to a new order or sequenceverb · exchange or give (something) in exchange forverb · lay aside, abandon, or leave for another“switch to a different brand of beer”
verb · make a shift in or exchange of“First Joe led; then we switched”
verb · cause to go on or to be engaged or set in operation“switch on the light”
verb · reverse (a direction, attitude, or course of action)