LIGHT SPEED

Pronunciation (US):

(GB):

 I. (noun) 

Sense 1

Meaning:

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

Synonyms:

c; light speed; speed of light

Classified under:

Nouns denoting time and temporal relations

Hypernyms ("light speed" is a kind of...):

constant (a number representing a quantity assumed to have a fixed value in a specified mathematical context)

speed; velocity (distance travelled per unit time)

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