To give formal consent to; make officially valid, sign off on.
To make of different kinds; to make different from one another; to diversity; to variegate.
To embellish; to change fancifully; to present under new aspects, as of form, key, measure, etc. See variation.
To be or act different from the usual.
Not to remain constant: to change with time or a similar parameter.
To institute a change in, from a current state; to modify.
To change with time or a similar parameter.
To display differences.