Hyper- \Hy"per-\ [Gr. "ype`r over, above; akin to L. super, E. over. See {Over}, and cf. {Super-}.] 1. A prefix signifying over, above; as, hyperphysical, hyperthyrion; also, above measure, abnormally great, excessive; as, hyper[ae]mia, hyperbola, hypercritical, hypersecretion. 2. (Chem.) A prefix equivalent to super- or per-; as hyperoxide, or peroxide. [Obs.] See {Per-}.