Modulus is a measuring quantity or parameter that expresses the magnitude or strength of a property rather than a direction. In science and engineering, it is used to indicate how strongly something responds to an influence, such as how resistant a material is to deformation or how large a mathematical quantity is in absolute terms. Depending on the context, modulus can refer to the stiffness of a material (as in elastic modulus), the absolute value of a number (as in mathematical modulus), or a constant that scales a physical response, but in all cases it conveys the idea of a standardized measure of intensity or magnitude.
