Primary Meanings of modulus
1. 
n 
(physics) a coefficient that expresses how much of a specified property is possessed by a specified substance

2. 
n 
the absolute value of a complex number

Full Definitions of modulus
1
n (physics) a coefficient that expresses how much of a specified property is possessed by a specified substance
 Types:
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coefficient of elasticity, elastic modulus, modulus of elasticity
(physics) the ratio of the applied stress to the change in shape of an elastic body

bulk modulus
the ratio of the change in pressure acting on a volume to the fractional change in volume

modulus of rigidity
the coefficient of elasticity for a shearing force

Young's modulus
a coefficient of elasticity applicable to the stretching of a wire
 Type of:

coefficient
a constant number that serves as a measure of some property or characteristic
2
n the absolute value of a complex number
 Type of:

absolute value, numerical value
a real number regardless of its sign
n an integer that can be divided without remainder into the difference between two other integers
“2 is a
modulus of 5 and 9”
 Type of:

integer, whole number
any of the natural numbers (positive or negative) or zero