Webster's 1828 Dictionary
UNDREAMED
a.Not dreamed; not thought of.
Webster's 1913 Dictionary
UNDREAMED; UNDREAMT
UNDREAMED; UNDREAMT Un *dreamed ", Un *dreamt ", a.
Defn: Not dreamed, or dreamed of; not thof. Unpathed waters, undreamed shores. Shak.
New American Oxford Dictionary
undreamed
un dreamed |ˌənˈdrēmd ənˈdrimd |(Brit. also undreamt |-ˈdremt |) ▶adjective (undreamed of ) not thought to be possible (used to express pleasant surprise at the amount, extent, or level of something ): a level of comfort undreamed of in earlier times | she is now enjoying undreamed-of success.
Oxford Dictionary
undreamed
undreamed |ʌnˈdriːmd, -ˈdrɛmt |(Brit. also undreamt |ʌnˈdrɛmt |) ▶adjective (undreamed of ) not thought to be possible (used to express pleasant surprise at the amount, extent, or level of something ): she is now enjoying undreamed-of success.
Oxford Thesaurus
undreamed of, undreamt of (Brit.)
undreamed of, undreamt of (Brit. ) adjective he raised the party's profile to undreamed-of heights: unexpected, unforeseen, unanticipated, not bargained for, unhoped-for, unsought, unlooked-for, unpredicted; unintentional, unintended, inadvertent, unplanned, unpremeditated, unwitting, fortuitous, chance, coincidental, serendipitous, random, fluky; sudden, abrupt, surprise, surprising, without warning, without notice, startling, astonishing, out of the blue. ANTONYMS deliberate, planned.
Sanseido Wisdom Dictionary
undreamed-of
un dreamed-of /ʌ̀ndríːmdʌ̀v |-ɔ̀v /形容詞 夢にも思わない, 思いもよらない, 想像だにしない ▸ an undreamed-of success 思いもよらない成功
The Wordsmith Dictionary