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[hahy-per] /ˈhaɪ pər/ Informal.
overexcited; overstimulated; keyed up.
seriously or obsessively concerned; fanatical; rabid:
She's hyper about noise pollution.
a person who is hyper.
Origin of hyper1
1970-75; probably independent use of hyper-


[hahy-per] /ˈhaɪ pər/
noun, Informal.
a person who promotes or publicizes events, people, etc., especially one who uses flamboyant or questionable methods; promoter; publicist.
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-.
Greek, representing hypér over, above; cognate with Latin super (see super-); akin to over
Can be confused
hyper-, hypo-. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for hyper
  • For starters, the people he links to for support warn about inflation that is distinctly not hyper in nature.
  • She was hyper for several hours uncovering bone after bone until the entire flipper was uncovered.
  • Slow boring stuff for when they are tired to exciting guitars and kick it beats when they are hyper.
  • hyper inflation tends to be a function of out of control public expenditures.
  • That's why this album is hyper compared to the others.
  • Shadow got a puppy who is hyper and dealt with his recovery from a serious leg break.
  • She's a good dog but she barks too much and is always really hyper.
  • It also seems that the lower dose does not risk the paradoxical response of making one hyper.
  • They were quiet, and literate, and in many ways the antidote to more hyper children's films.
  • In the other case the object is retained, and there is a hyper-cathexis of it by the ego and at the ego's expense.
British Dictionary definitions for hyper


(informal) overactive; overexcited
Word Origin
C20: probably independent use of hyper-


above, over, or in excess: hypercritical
(in medicine) denoting an abnormal excess: hyperacidity
indicating that a chemical compound contains a greater than usual amount of an element: hyperoxide
Word Origin
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
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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
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hyper in Medicine

hyper- pref.

  1. Over; above; beyond: hyperflexion.

  2. Excessive; excessively: hyperhydration.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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hyper in Science
A prefix that means "excessive" or "excessively," especially in medical terms like hypertension and hyperthyroidism.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Slang definitions & phrases for hyper

hyper 1

n,n phr

A publicist; promoter; advertiser; flack

[1960+; fr hype2]

hyper 2

  1. Overexcited; manic; overwrought; hyped-up: She tells how the grownups gave her Nembutal when she was eight years old, because ''I was hyper''/ It's this flaky hyper hour/ She's a hyper-person, accustomed to constant activity (1942+)
  2. Exceeding most; very superior;: with harem cushions, a hyper-hi-fi set, ha-ha candles (1970s+)
Related Terms

throw a fit

[fr Greek hyper, ''super,'' and in the first sense probably fr medical terms like hyperactive, hyperkinetic, hyperthyroid, etc; in some sources this term is associated with hipped and hippish, fr hypochondriac, ''melancholic,'' first found in the early 18th century]

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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