ultrafast
adjective
ultrafast is spelled U-L-T-R-A-F-A-S-T: 9 letters. It appears about once in every 5 million words in written English, the 69,884th most frequent word form (wordfreq, 2021 data). As an adjective, ultrafast means “Very fast, or of very short duration; especially concerning events that take place in femtosecond or picosecond timescales” (English Wiktionary, September 2026).
How many letters and syllables are in ultrafast?
| Letters | 9: U-L-T-R-A-F-A-S-T |
|---|---|
| In writing | about once in every 5 million words; the 69,884th most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is ultrafast?
Ultrafast appears about once in every 5 million words in written English, the 69,884th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Words people confuse with ultrafast
Also written: ultra-fast (one word or two).
Sources: English Wiktionary (homophones, alternative spellings).
Forms of ultrafast
- more ultrafast comparative
- most ultrafast superlative
- ultra-fast
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does ultrafast mean?
The meanings the English Wiktionary records, quoted as written there (source below).
adjective
- 1
Very fast, or of very short duration; especially concerning events that take place in femtosecond or picosecond timescales.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Where does ultrafast come from?
From ultra- + fast.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).