derivative (Adjective) — Derived from, based on or imitating something else. ex. "a derivative process" ex. "a highly derivative prose style"
derivative (Noun) — The result of mathematical differentiation; the instantaneous change of one quantity relative to another; df(x)/dx.
derivative (Noun) — A compound obtained from, or regarded as derived from, another compound.
derivative (Noun) — (law) a financial instrument whose value is based on another security.
derivative (Noun) — (linguistics) a word that is derived from another word. ex. "'electricity' is a derivative of 'electric'"