1. a number or constant that is placed before and multiplies a variable in an algebraic expression
Usage: mathematics
2. a numerical measure of a physical or chemical property that is constant for a system under specified conditions
Usage: physics; chemistry

Examples

• In the equation 3x + 5y = 12, the coefficient of x is 3.
• The coefficient of friction between the two surfaces was 0.4.
• Students learned to identify coefficients in polynomial expressions.
• The expansion coefficient of the metal increased with temperature.
• In 7x², the coefficient is 7 and the variable is x².
• Scientists measured the absorption coefficient of the material.