1. run down injure or kill by running over, as with a vehicle
  2. run-down worn and broken down by hard use
  3. rundown a concluding summary
  4. round down express as a round number
  5. rhinestone an imitation diamond made from rock crystal or glass or paste
  6. rain down precipitate as rain
  7. swan's down down of the swan
  8. sunstone a translucent quartz spangled with bits of mica or other minerals
  9. hands down with no difficulty
  10. bring down move something or somebody to a lower position
  11. hands-down achieved without great effort
  12. genus Dioon small genus of arborescent cycads of Mexico and Central America; sometimes classified in family Cycadaceae
  13. grind down rule a country as a tyrant
  14. hunt down pursue for food or sport (as of wild animals)
  15. drink down drink down entirely
  16. bunk down go to bed
  17. sundown the time in the evening at which the sun begins to fall below the horizon
  18. gun down strike down or shoot down
  19. rub down manually manipulate (someone's body), usually for medicinal or relaxation purposes
  20. Princeton a university in New Jersey