Definition of harkens:
(v) :
(intransitive, US, figuratively) To hark back, to return or revert (to a subject, etc.), to allude to, to evoke, to long or pine for (a past event or era).
(n) :
A surname from German.
(v) :
(ambitransitive, chiefly US) Alternative spelling of hearken: to hear, to listen, to have regard. [(transitive, archaic except poetic) To hear (something) with attention; to have regard to (something).]