hyper-

1.
a prefix appearing in loanwords from Greek, where it meant “over,” usually implying excess or exaggeration (hyperbole); on this model used, especially as opposed to hypo-, in the formation of compound words (hyperthyroid).
Compare super-.
Origin
Greek, representing hypér over, above; cognate with Latin super (see super-); akin to over
Can be confused
hyper-, hypo-.
British Dictionary definitions for hyper-

hyper-

prefix
1.
above, over, or in excess: hypercritical
2.
(in medicine) denoting an abnormal excess: hyperacidity
3.
indicating that a chemical compound contains a greater than usual amount of an element: hyperoxide
Word Origin
from Greek huper over
Word Origin and History for hyper-

word-forming element meaning "over, above, beyond, exceedingly, to excess," from Greek hyper (prep. and adv.) "over, beyond, overmuch, above measure," from PIE super- "over" (see super-).

hyper- in Medicine

hyper- pref.

  1. Over; above; beyond: hyperflexion.

  2. Excessive; excessively: hyperhydration.

hyper- in Science
hyper-  
A prefix that means "excessive" or "excessively," especially in medical terms like hypertension and hyperthyroidism.