Definite Integral:The integral of a function over a specific interval $[a, b]$, which represents the net area under the curve between these points.
Antiderivative:A function $F(x)$ whose derivative is equal to the original function $f(x)$. In other words, if $F'(x) = f(x)$, then $F(x)$ is an antiderivative of $f(x)$.
Fundamental Theorem of Calculus:A principle that links differentiation and integration, comprising two parts: one that defines the integral as an antiderivative and another that relates definite integrals to evaluations at boundary points.