Of or relating to gambling on races that is conducted away from a racetrack.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "off-track" in a sentence
"My goodness am I off-track on today's subject, sitting here typing when I should be packing."
"When a thread has gone off-track or has become too long, it's an easy enough matter for visitors to simply recognize that without an explanation."
"Dr. Cantor said she first deals with the most disruptive children, the small percentage who "are capable of taking a school filled with vulnerable children and sending it completely off-track.""