light speed

Found in Anh - Anh (Wordnet)

Definition Noun : 1. The speed at which light travels in a vacuum : This is a fundamental constant of nature, representing the maximum speed at which all conventional matter and information in the universe can travel. It is defined as exactly 299,792,458 meters per second. Usage Examples Noun : Nothing with mass can travel at light speed . The theory of relativity is based on the principle that...