High-speed

Full definition of high-speed

Adjective

1. That operates, moves or takes place at a greater than normal speed.
• 2013-06-01, Ideas coming down the track, A “moving platform” scheme...is more technologically ambitious than maglev trains even though it relies on conventional rails....This set-up solves several problems …. Stopping high-speed trains wastes energy and time, so why not simply slow them down enough for a moving platform to pull alongside?

Antonyms

• low-speed