ul·tra

[uhl-truh]
adjective
1.
going beyond what is usual or ordinary; excessive; extreme.
noun
2.
an extremist, as in politics, religion, fashion, etc.
3.
(initial capital letter) Military. the British code name for intelligence gathered by decrypting German wireless communications enciphered on the Enigma machine during World War II.

Origin:
independent use of ultra-, or shortening of words prefixed with it

Dictionary.com Unabridged

ultra-

a prefix occurring originally in loanwords from Latin, with the basic meaning “on the far side of, beyond.” In relation to the base to which it is prefixed, ultra-, has the senses “located beyond, on the far side of” (ultramontane; ultraviolet), “carrying to the furthest degree possible, on the fringe of” (ultraleft; ultramodern), “extremely” (ultralight); nouns to which it is added denote, in general, objects, properties, phenomena, etc., that surpass customary norms, or instruments designed to produce or deal with such things (ultramicroscope; ultrasound; ultrastructure).

Origin:
< Latin ultrā (adv. and preposition) on the far side (of), beyond, derivative of *ult(e)r- located beyond

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To ultra
00:10
Ultra is always a great word to know.
So is ort. Does it mean:
a gadget; dingus; thingumbob.
a scrap or morsel of food left at a meal.
Collins
World English Dictionary
ultra (ˈʌltrə) [Click for IPA pronunciation guide]
 
adj
1.  extreme or immoderate, esp in beliefs or opinions
 
n
2.  an extremist
 
[C19: from Latin: beyond, from ulter distant]

ultra-
 
prefix
1.  beyond or surpassing a specified extent, range, or limit: ultramicroscopic
2.  extreme or extremely: ultramodern
 
[from Latin ultrā beyond; see ultra]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

ultra-
prefix meaning "beyond" (ultraviolet) or "extremely" (ultramodern), from L. ultra- from ultra (adv. and prep.) "beyond, on the further side," from PIE *al- "beyond." In common use from early 19c., it appears to have arisen from Fr. political designations. As its own word, a noun meaning "extremist" of
various stripes, it is first recorded 1817, from Fr. ultra, shortening of ultra-royaliste "extreme royalist."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

ultra- pref.

  1. Beyond; on the other side of: ultraviolet.

  2. Beyond the range, scope, or limit of: ultrasonic.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Furthermore, they have a high mechanical strength, and they have applications
  as ultra-high density capacitors.
You'd train the staff to be ultra-friendly and ultra-efficient.
The program asks engineers to invent ultra-lightweight vehicles that could come
  in handy for urban military missions.
He and his colleagues have developed two basic approaches to stretching
  circuits built on ultra-thin, bendable silicon.
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