Pronunciation: (härk), [key]
to listen attentively; hearken.
1. Archaic.to listen to; hear.
2. hark back,
a. (of hounds) to return along the course in order to regain a lost scent.
b. to return to a previous subject or point; revert: He kept harking back to his early days in vaudeville.
a hunter's shout to hounds, as to encourage them in following the scent.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.