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• ultra
  ultra

  adjective

  going beyond what is usual or ordinary; excessive; extreme.
• ultra-
  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 ).

ultra

¹ American  

[uhl-truh] / ˈʌl trə /

adjective

1. going beyond what is usual or ordinary; excessive; extreme.

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noun

• ultras
  plural

1. an extremist, as in politics, religion, fashion, etc.

2. Military. Ultra, the British code name for intelligence gathered by decrypting German wireless communications enciphered on the Enigma machine during World War II.

ultra- ² American  

1. 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 ).

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ultra ¹ British  

/ ˈʌltrə /

adjective

1. extreme or immoderate, esp in beliefs or opinions

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noun

1. an extremist

ultra- ² British  

prefix

1. beyond or surpassing a specified extent, range, or limit

   ultramicroscopic

2. extreme or extremely

   ultramodern

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Other Word Forms

Noun Inflected Forms

• ultras
  plural

Etymology

Origin of ultra¹

Independent use of ultra-, or shortening of words prefixed with it

Origin of ultra-²

From Latin ultrā (adverb and preposition) “on the far side,” derivative of ulter (unrecorded) “located beyond”

Explanation

Use the adjective ultra to describe something extreme, like your ultra strict parents or your own ultra radical political views. If your sister is ultra uptight and your English teacher's syllabus is ultra traditional, it means that both of them hold unusual opinions, far outside of the normal range. Neither would be a good fit for your own ultra relaxed philosophy of life. Ultra means "beyond" in Latin, and its meaning of "outside the norm" comes from the French word ultra-royaliste, or "extreme royalist." Eventually, it was shortened to just ultra, to describe any extreme opinion.

Example Sentences

See Examples For:

ultra ultra- ultras

Qantas's "Project Sunrise" using ultra long-haul planes has been on the cards for the past nine years -- but has been repeatedly delayed.

From Barron's ● Jul. 28, 2026

Some versions of the Nova scale also include “processed” food as a third level in between minimally processed and ultra.

From Slate ● Jul. 12, 2026

Researchers at Tokyo Metropolitan University have developed a new way to control how ink dries by adding ultra fine bubbles to ink droplets instead of chemical additives.

From Science Daily ● Jul. 11, 2026

They point out that, while Australia and New Zealand’s geography justify a scaled ultra long-haul fleet, Qantas’s northern hemisphere peers don’t appear to have sufficient use cases to warrant the investment.

From The Wall Street Journal ● Jun. 23, 2026

Still, in June 1633, during Galileo’s trial, his friend Benedetto Castelli wrote to him, remarking that the Catholic Church seemed to want to establish new columns of Hercules bearing the slogan non plus ultra.

From "The Invention of Science" by David Wootton

In particular, she said, “fares for Etihad’s unique, ultra-luxury, ultra- private offering are not subject to discounts or promotional fares.”

From Forbes ● Mar. 8, 2015

For the ultra- dedicated gamer in your life, you can pick up Dragon Age Inquisition, which has a 40 hour story and about 200 hours worth of stuff to do in total.

From Forbes ● Nov. 28, 2014

This type of story, says Michael Hurt, a former English teacher who is now completing a P.H.D. in Seoul, has helped turn teachers into an "easy target" for ultra- nationalists.

From Time ● Dec. 24, 2010

"If you convince people that the Messiah is coming and he doesn't," says Amnon Levy, author of a book on the ultra- Orthodox, "a whole generation may lose its faith."

From Time Magazine Archive

Be sure to moisturize with an ultra- hydrating serum like The Corporation’s new Skin So Right B14 Complex for Total Cell Renewal, made with essential vitamins, minerals, and concentrated yak’s bladder.

From "Beauty Queens" by Libba Bray

They organized visits from true-blue French soccer ultras for a cultural exchange: the Europeans taught chants while the Texans taught barbecue.

From The Wall Street Journal ● May 27, 2026

The club's ultras - long-time critics of the association with BlueCo - demanded he hand back the captain's armband.

From BBC ● Feb. 5, 2026

Palme d’Or winners and catwalk icons gather in the private boxes while shirtless ultras sing themselves hoarse behind the goals.

From The Wall Street Journal ● Jan. 4, 2026

The ultras fan group state: "The justification for the ban is disingenuous, similar to previous bans."

From BBC ● Nov. 7, 2025

The "ultras" in Virginia, under the lead of Tucker, and in Alabama under Yancey, frankly avowed their desire to stimulate impossible demands so that disunion would be inevitable.

From Webster's Seventh of March Speech and the Secession Movement, 1850 by Nathaniel W. (Nathaniel Wright) Stephenson