I have a sentence,
Here's a rundown on/of the activities of our ten biggest competitors.
The meaning of rundown is 'a detailed report' which I cannot interpret intuitively.
if the slang means 'supporting' I can discern easier as supporting somebody a bridge to rundown from a dilemma.
In Wikipedia, it explains in baseball which is difficult for non-native speakers without that sports in majority.
in baseball, 1908, from verbal phrase, from run (v.) + down (adv.). Meaning "list of entries in a horse race and the odds" is from 1935; slang generalized sense of "summary, account, list of information or facts" is from 1945.
What's the story about the extending of slang 'rundown'