D defs.my
Entry 3 senses Webster, 1913

Unheard

/ən-hẽrd'/ · Un·heard · IPA /ʌnˈhɜː(ɹ)d/
01 a. Not heard; not perceived by the ear; as, words unheard by those present.
  1. 1.
    Not heard; not perceived by the ear; as, words unheard by those present.
  2. 2.
    Not granted an audience or a hearing; not allowed to speak; not having made a defense, or stated one's side of a question; disregarded; unheeded; as, to condem� a man unheard.
    “What pangs I feel, unpitied and unheard!” Dryden.
  3. 3.
    Not known to fame; not illustrious or celebrated; obscure.
    “Nor was his name unheard or unadored.” Milton.
Phrases & compounds
Unheard of — Not heard of; of which there are no tidings.