on (one's) trail

on (one's) trail

Following, pursuing, or tracking one. The cops are on our trail—we have to lose them in the woods. A: "And what about the accountant who stole that money from us?" B: "I'm on his trail, sir."
See also: on, trail
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
See also: