Definitions from Wiktionary (Ultra-fast)
▸ adjective: Alternative form of ultrafast [Very fast, or of very short duration; especially concerning events that take place in femtosecond or picosecond timescales.]
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▸ adjective: Alternative form of ultrafast [Very fast, or of very short duration; especially concerning events that take place in femtosecond or picosecond timescales.]
Similar:
ultrahigh,
super-instantaneous,
ultra-pure,
high speed,
highspeed,
fastmoving,
ultra-refined,
ultra-natural,
ultra-progressive,
ultra rich,
more...
Opposite:
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▸ Wikipedia articles (New!)
▸ Popular nouns described by ultra-fast
▸ Words that often appear near ultra-fast
▸ Rhymes of ultra-fast
▸ Invented words related to ultra-fast