What does the word prescription mean?

Usage examples for prescription

  1. A week later she came again, and I gave her a prescription to allay her mother's nervousness. – At the Mercy of Tiberius by August Evans Wilson
  2. One interesting prescription, written and signed in a hand that looks very French, has the heading in Mrs. Stevenson's hand, " Elixir of Life." – The Life of Mrs. Robert Louis Stevenson by Nellie Van de Grift Sanchez
  3. Let a man eat a shovelful of salt, according to the prescription of Aristotle, with the person upon whose head and heart he makes so superficial a judgment, and he will then find what will become of his former judgment. – The Student-Life of Germany by William Howitt