ultra

1 of 3

adjective

ul·​tra ˈəl-trə 

: 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

Synonyms of ultra

Adjective

• extreme
• radical
• rabid
• revolutionary

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

Adjective

The new 32-inch color touchscreen display has a 6K ultra-high-definition panel for video editing work and detailed illustration and drafting applications. —Mark Sparrow, Forbes.com, 24 May 2026

From rustic to ultra luxury, ranches offer fly fishing, horseback riding, hiking, and more. —Patricia Doherty, Travel + Leisure, 24 May 2026

Noun

The club’s ultras left their section empty for the first 30 minutes of the match in protest. —Tom Bogert, New York Times, 28 Apr. 2026

Colorado invites the pressure ultra deep in its own area often, but Josh Atencio took a wayward touch on a pass from Zack Steffen. —Braidon Nourse, Denver Post, 19 Apr. 2026

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

Phrases Containing ultra

• ne plus ultra
• ultra-civilized
• ultra-commercial
• ultra-pasteurized
• ultra-processed
• ultra-rare
• ultra vires
• ultra-wide

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"