(an instance, act, of) exchanging things

trade; deal

to organize (members, soldiers) into the previous order or a new order

the act of reforming

(an example of) the act of reforming or being reformed; the 16th-century movement for religious reform resulting in the establishment of the Protestant Church

the act of reforming

a change of place, direction or character; a change of one thing for another; a mechanism for changing gears in a vehicle; a group of workers that starts work as another group finishes; period for which such a group works

switch, fluctuation