light speed

/laɪt spid/
IPA guide

Other forms: light speeds

Definitions of light speed
  1. noun
    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, speed of light
    see moresee less
    type 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
Cite this entry
Style:
MLA
  • MLA
  • APA
  • Chicago

Copy citation
DISCLAIMER: These example sentences appear in various news sources and books to reflect the usage of the word ‘light speed'. Views expressed in the examples do not represent the opinion of Vocabulary.com or its editors. Send us feedback
Word Family