Standard Lemma guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
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No pronunciation record was provided for this word.
adj
Very fast, or of very short duration; especially concerning events that take place in femtosecond or picosecond timescales.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
Etymology tree English ultra- Proto-Germanic *fastuz Proto-West Germanic *fast Old English fæst Middle English fast English fast English ultrafast From ultra- + fast.
Across languages
1 source translations are retained for this English entry.
