Definition of PONY

  1. (noun)a range horse of the western United States
  2. (noun)an informal term for a racehorse
  3. (noun)a literal translation used in studying a foreign language (often used illicitly)
  4. (noun)a small glass adequate to hold a single swallow of whiskey
  5. (noun)any of various breeds of small gentle horses usually less than five feet high at the shoulder