Math. an integral in which the range of integration is specified: its value equals the area on a graph bounded by a curve, the x-axis, and two given ordinates
See definite integral in American Heritage Dictionary 4
An integral that is calculated between two specified limits, usually expressed in the form ∫ b/a ƒ(x)dx. The result of performing the integral is a number that represents the area under the curve of ƒ(x) between the limits and the x-axis if f(x) is greater than or equal to zero between the limits.
The result of an integration performed on a fixed interval.