ultra-fast

A form of ultrafast — Very fast, or of very short duration; especially concerning events that take place in femtosecond or picosecond timescales.

Meanings

adjectiveultra-fast (not comparable)
  1. alternativenot comparableAlternative form of ultrafast.

    Less important lines of plain double track carrying a mixture of passenger and freight traffic cannot be given ultra-fast expresses, and where alternative routes exist, as for example between London and the West Riding, the specially high-speed trains must be restricted to one of them only.

    1960 February, “Talking of Trains”, in Trains Illustrated, page 67

Origin

Cite this entry
APA

ultra-fast. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/ultra-fast

MLA

“ultra-fast.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/ultra-fast. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “ultra-fast,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/ultra-fast.

Source: ultra-fast on Wiktionary, CC BY-SA 4.0.