English to English

noun (n)

• distance travelled per unit time(noun.time)

  Synonym:
  speed
  

  source: wordnet30
• Quickness of motion; swiftness; speed; celerity; rapidity; as, the velocity of wind; the velocity of a planet or comet in its orbit or course; the velocity of a cannon ball; the velocity of light.(noun)

  source: webster1913