Pronunciation: (härk),[key] —v.i. to listen attentively; hearken.
—v.t. 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.
—n. a hunter's shout to hounds, as to encourage them in following the scent.