Definition of "modulus"

(mathematics) The base with respect to which a congruence is computed.  examples

(mathematics) The absolute value of a complex number.  examples

(physics) A coefficient that expresses how much of a certain property is possessed by a certain substance.  examples

(physics) A scalar field controlling the shape and size of extra dimensions in a compactification.  examples

(computing, programming) An operator placed between two numbers, to get the remainder of the division of those numbers.  examples