Wiktionary
vb. to pursue and apprehend someone or something.
Usage examples of "chase down".
When Mary Catherine asked Zeldo why he was still here, he broke eye contact and muttered some hacker aphorism about how hard it was to chase down the last few bugs.
They set Chase down while Richard's head swiveled around, looking.
The simple meal would have to be enough, because she wasn't about to go out into the storm to chase down a chicken for sup.
The simple meal would have to be enough, because she wasn't about to go out into the storm to chase down a chicken for supper.
This pause gave her time enough to chase down the memory of the face in the lineup.
Why the Rangers used to just show up out here, and chase down our convoys, and shoot us.
They had fifteen minutes now to chase down the Americans, or Group Two--4he youngsters aboard the Brezhnev--would launch and go for the intercept.