Definitions for "Lightspeed"
a logic game based on directing the light
Lightspeed is a 1990 computer game released Micro Prose. The box describes the title as an "Interstellar Action and Adventure" game. The game features space exploration, trade, combat and diplomacy in the same vein as "4 X"-style (eXplore, eXpand, eXploit, eXterminate) games such as Master of Orion.
Quite simply, the speed at which light travels. This is the fastest speed that can ever be reached. Nothing can accelerate beyond this speed. It is recorded to be 299,792,458 metres per second in a vacuum.
The speed of light in vacuum, equal to about 186 thousand miles per second.