LIGHT SECOND

Pronunciation (US):

(GB):

IPA (US):

 Dictionary entry overview: What does light second mean? 

• LIGHT SECOND (noun)
  The noun LIGHT SECOND has 1 sense:

1. the distance light travels in a vacuum in one second; approximately 300,000 kilometers

  Familiarity information: LIGHT SECOND used as a noun is very rare.

 Dictionary entry details 

• LIGHT SECOND (noun)

Sense 1

Meaning:

The distance light travels in a vacuum in one second; approximately 300,000 kilometers

Classified under:

Nouns denoting quantities and units of measure

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

astronomy unit (a linear unit used for astronomical distances)

Holonyms ("light second" is a part of...):

light-year; light year (the distance that light travels in a vacuum in 1 year; 5.88 trillion miles or 9.46 trillion kilometers)