n. The act of forming anew; a second forming in order: as, the reformation of a column of troops into a hollow square.n. The act of reforming what is defective or evil, or the state of being reformed; correction or amendment, as of life or manners, or of a government.n. Specifically, with the definite article The great religious revolution in the sixteenth century, which led to the establishment of the Protestant churches.n. Synonyms Amendment, Reform, Reformation. Amendment may be of any degree, however small; reform applies to something more thorough, and reformation to that which is most important, thorough, and lasting of all. Hence, when we speak of temperance reform, we dignify it less than when we call it temperance reformation. Moral reform, religious reformation; temporary amendment or reform, permanent reformation. Reform represents the state more often than reformation.