D defs.my
Entry 1 sense Webster, 1913

Hark

/(härk)/ · IPA /hɑː(ɹ)k/
01 v. i. To listen; to hearken.
  1. 1.
    To listen; to hearken.[Now rare, except in the imperative form used as an interjection, Hark! listen.]
    “He must have overshot the mark, and must hark back.” — Haggard.
    “He harked back to the subject.” — W. E. Norris.