Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps


Noun: light second
  1. The distance light travels in a vacuum in one second; approximately 300,000 kilometres

Derived forms: light seconds

Type of: astronomy unit

Part of: light year, light-year

Encyclopedia: Light second

Nearest

light machine gun
light meter
light microscope
light middleweight
light minute
light opera
light pen
light pollution
light reaction
light reflex
light second
light show
light sleep
light source
light speed
light syllable
light time
light touch
light unit
light up
light upon