1. an expression of the change or effect produced by the variation in certain variables, or of the ratio between two different quantities. 2. in chemistry, a number or figure put before a chemical formula to indicate how many times the formula is to be multiplied. absorption coefficient absorptivity.
Definition of Alteration. an event that occurs when something passes from one state or phase to another; the change was intended to increase sales; this storm is certainly a change for the worse; the neighborhood had undergone few modifications since his last visit years ago the act of making something different (as e.g. the size of a garment)
Material Alteration Law and Legal Definition. Material alteration is change of a mark made after a trademark application is submitted. The mark will be altered from that shown in the original application. Material alteration of a mark is considered as a ground for rejection of a proposed amendment to an application. Pursuant to 37 CFR 2.72, any amendment of the mark in an application that materially alters the mark is prohibited.