track down

track down idiom
Follow successfully, locate, as in I've been trying to track down that book but haven't had any luck. This term alludes to the literal use of track, “follow the footsteps of.” [Second half of 1800s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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