ultra- Meaning in the Cambridge English Dictionary Cambridge dictionaries logo
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Meaning of “ultra-” in the English Dictionary

"ultra-" in British English

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ultra-prefix

uk   /ʌl.trə-/  us   /ʌl.trə-/
extreme or ​extremely: ultra-expensive ultra-modern ​architecture ultra-sensitive an ultra-short ​haircut
(Definition of ultra- from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"ultra-" in American English

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ultra-prefix

 us   /ˌʌl·trə/
extreme or ​extremely: ultraconservative ultramodern
(Definition of ultra- from the Cambridge Academic Content Dictionary © Cambridge University Press)

"ultra-" in Business English

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ultra-adverb

uk   us  
used with adjectives to ​mean 'extremely': These ultra-thin loudspeakers can be ​hidden as paintings on a ​wall. an ultra-conservative ​politicalgroup The ​network uses ultra-fast fiber-optic ​cable.
(Definition of ultra- from the Cambridge Business English Dictionary © Cambridge University Press)
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