speed of light(redirected from Light speed barrier)
Also found in: Thesaurus, Encyclopedia.
Switch to new thesaurus
|Noun||1.||speed of light - the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second|
constant - a number representing a quantity assumed to have a fixed value in a specified mathematical context; "the velocity of light is a constant"