overexcited; overstimulated; keyed up.
seriously or obsessively concerned; fanatical; rabid: She's hyper about noise pollution.


a person who is hyper.

Origin of hyper

First recorded in 1970–75; probably independent use of hyper-



noun Informal.

a person who promotes or publicizes events, people, etc., especially one who uses flamboyant or questionable methods; promoter; publicist.

Origin of hyper

1910–15, Americanism, for an earlier sense; hype1 + -er1


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 of hyper-

Greek, representing hypér over, above; cognate with Latin super (see super-); akin to over
Can be confusedhyper- hypo-
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for hyper

Contemporary Examples of hyper

Historical Examples of hyper

  • I know what it's like to be three thousand hours in hyper, myself.

    Space Viking

    Henry Beam Piper

  • We could hyper, of course, but we were blind up there in Cth.

    A Question of Courage

    Jesse Franklin Bone

  • It led naturally to the employment of Hyper- in the inverse sense, viz.

  • Why is it then that, at this moment, I feel inclined to be hyper critical and disparaging?

    Barren Honour: A Novel

    George A. Lawrence

  • You give me a quarter on hyper and we'll go right through that planet!

    Danger in Deep Space

    Carey Rockwell

British Dictionary definitions for hyper



informal overactive; overexcited

Word Origin for hyper

C20: probably independent use of hyper-



above, over, or in excesshypercritical
(in medicine) denoting an abnormal excesshyperacidity
indicating that a chemical compound contains a greater than usual amount of an elementhyperoxide

Word Origin for hyper-

from Greek huper over
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for hyper

1942 as a colloquial shortening of hyperactive.


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-).

Online Etymology Dictionary, © 2010 Douglas Harper

hyper in Medicine



Over; above; beyond:hyperflexion.
Excessive; excessively:hyperhydration.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

hyper in Science


A prefix that means “excessive” or “excessively,” especially in medical terms like hypertension and hyperthyroidism.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.