lightspeed n. 1

By converting twenty millions of units that are determined by periods of steam-speed, into one unit that is determined by light-speed, a new comprehensive span is obtained.

Indeed, the vastly greater speed thus attained made us at last regard, with something like contempt, the old ordinary light-speed of about one hundred and eighty thousand miles in a second.

Measuring light speed. Even in this speed mad age we can never hope to equal the speed of light.

I’ll stick at twenty-five times light speed and slow down after we get there by taking an orbit.

The skilful hands at the controls were turning adjustments now, and that disc of flame seemed to leap toward him with a hundred light-speeds, growing to a disc as large as a dime in an instant, while the myriad points of the stars seemed to scatter like frightened chickens, fleeing from the growing sun, out of the screen.

Far past in the gone ages of our race, we were pitiful, tiny blobs of energy which crept along at less than light speed.

Just how far the madness would carry on, whether it would end at the point of light speed, only time would tell.

She had the required two second-order converters, either capable of holding the ship, and six hundred tons of additional mass in the necessary condition for interstellar flight above light-speed.

What about light[-]speed ships?

A lightspeed message proliferated through ship relays.

The more massive yacht, with its limited drive system, could not possibly outmaneuver a Fleet shuttle as long as it stayed below lightspeed.

If we're going to a world a hundred light-years from here at near lightspeed, we spend according to our own perceptions, only a few minutes doing so and arrive only a few minutes older.

The siluminium underwent a special reaction to allow Matilda to travel at velocities approaching light-speed, and that reaction stopped when the ship had to come to a halt.