ultra

1 of 3

adjective

ul·​tra ˈəl-trə How to pronounce ultra (audio)
Synonyms of ultranext
: going beyond others or beyond due limit : extreme

ultra

2 of 3

noun

: one that is ultra : extremist

ultra-

3 of 3

prefix

1
: beyond in space : on the other side : trans-
ultraviolet
2
: beyond the range or limits of : transcending : super-
ultramicroscopic
3
: beyond what is ordinary, proper, or moderate : excessively : extremely
ultramodern

Examples of ultra in a Sentence

Adjective espouses a kind of ultra conservatism that even some members of his own party cannot support
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Adjective
One such phenomenon, called the Josephson effect, lies at the heart of quantum computers, ultra-precise voltage standards, and sensitive medical tools used to measure brain activity. Rupendra Brahambhatt, Interesting Engineering, 13 Dec. 2025 The idea is to draw attention to that one spot on the face for a soft and ultra-feminine aesthetic. Kaleigh Werner, Footwear News, 12 Dec. 2025
Noun
Fiorentina’s ultras refused to go to the game in protest at ticket prices but showed up on the outskirts of Pisa, smarting for a fight anyway. James Horncastle, New York Times, 30 Sep. 2025 The Pixel 10 sports a 48 MP primary, a 13 MP ultra wide, and a 10.8 MP 5x telephoto—this setup is most similar to Google's foldable phone. ArsTechnica, 29 Aug. 2025 See All Example Sentences for ultra

Word History

Etymology

Adjective

ultra-

Noun

ultra-

Prefix

Latin, from ultra beyond, adverb & preposition, from *ulter situated beyond — more at ulterior

First Known Use

Adjective

1818, in the meaning defined above

Noun

1819, in the meaning defined above

Time Traveler
The first known use of ultra was in 1818

Browse Nearby Words

Cite this Entry

“Ultra.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ultra. Accessed 17 Dec. 2025.

Kids Definition

ultra

1 of 2 adjective
ul·​tra
ˈəl-trə
: going beyond others : extreme

ultra-

2 of 2 prefix
1
: beyond : exceeding the range or limits of
ultraviolet
2
: more than is usual
ultramodern
Etymology

Prefix

derived from Latin ultra "beyond"

More from Merriam-Webster on ultra

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!