light speed

or light·speed

[ lahyt speed ]

noun

1. Physics, Optics. speed of light ( def 1 ).
2. an extremely fast rate:

   The rumor circulated at light speed around the town.

adjective

1. very fast:

   Her best time in the race is a lightspeed 8.7 seconds.

Word History and Origins

Origin of light speed¹

First recorded in 1855–60

Example Sentences

Memes that ridiculed political leaders and the Hong Kong Police Force shot through fiber optic cables at light speed.

From The Daily Beast

And today, cash zips around the world at light speed at all hours of the day.

From The Daily Beast

An inter-system Empire is hard to maintain, even with ships that approach light speed.

From Project Gutenberg

As you know, that object diminished in length and gained in mass as it moved toward light speed.

From Project Gutenberg

This was the first instance I had heard of encountering an object at hyper light speed.

From Project Gutenberg

Again a tiny ship entered Thett's far-flung atmosphere, and slowed to less than a light speed, and sent its signal call ahead.

From Project Gutenberg

Either the standard, multiple light-speed overdrive could be used, or the newer and vastly slower one, but not both together.

From Project Gutenberg