What is the meaning of run down?

verb

• Trace.
  • usage: "We are running down a few tips"
  • synonyms: check out
• Move downward.
  • usage: "The water ran down"
• Injure or kill by running over, as with a vehicle.
  • synonyms: run over
• Use up all one's strength and energy and stop working.
  • usage: "At the end of the march, I pooped out"
  • synonyms: poop out, peter out, run out, conk out
• Examine hastily.
  • usage: "She scanned the newspaper headlines while waiting for the taxi"
  • synonyms: scan, skim, rake, glance over
• Deplete.
  • usage: "exhaust one's savings"; "We quickly played out our strength"
  • synonyms: exhaust, play out, sap, tire
• Pursue until captured.
  • usage: "They ran down the fugitive"