Search Result for "unheard-of": 
Wordnet 3.0

ADJECTIVE (1)

1. previously unknown;
- Example: "a first novel by an unheard of writer"
- Example: "developments on an unheard-of scale"



The Collaborative International Dictionary of English v.0.48:

Unheard-of \Un*heard"-of\, a.
   New; unprecedented; unparalleled. --Swift.
   [1913 Webster]


WordNet (r) 3.0 (2006):

unheard-of
    adj 1: previously unknown; "a first novel by an unheard of
           writer"; "developments on an unheard-of scale"


Moby Thesaurus II by Grady Ward, 1.0:

19 Moby Thesaurus words for "unheard-of":
   disgraceful, extreme, inconceivable, nameless, obscure, offensive,
   outlandish, outrageous, shocking, unbelievable, unfamiliar,
   unidentified, unimaginable, unimagined, unknown, unprecedented,
   unsung, unthinkable, unusual