What is "commutate"

vb. 1 (context transitive electronics English) To reverse the direction of (a current). 2 (context transitive electronics English) To convert from being or using an alternating current into being or using a direct current. 3 (context intransitive mathematics English) To commute; to be invariant under a reversal of the positions of operands. 4 (context transitive finance English) To commute; to change one kind of payment into another, especially to convert from several installments to a single lumpsum payment. 5 (context transitive law English) To remove or reduce the legal obligations or restrictions on; 6 (context transitive English) To transform, especially into a reversed or opposite form.

v. reverse the direction of (an alternating electric current) each half cycle so as to produce a unidirectional current