run down (Adjective) — Having the spring unwound. ex. "a run-down watch"
run down (Adjective) — Worn and broken down by hard use. ex. "a run-down neighbourhood"
run down (Noun) — (law) a concluding summary (as in presenting a case before a law court).
run down (Noun) — A sketchy summary of the main points of an argument or theory.
run down (Verb) — Trace. ex. "We are running down a few tips"
run down (Verb) — Move downward. ex. "The water ran down"
run down (Verb) — Injure or kill by running over, as with a vehicle.
run down (Verb) — Use up all one's strength and energy and stop working.
run down (Verb) — Examine hastily. ex. "She ran down the newspaper headlines while waiting for the taxi"
run down (Verb) — Deplete. ex. "run down one's savings"
run down (Verb) — Pursue until captured. ex. "They ran down the fugitive"