Dictionary
unheard–of
adjective un·heard–of \-ˌəv, -ˌäv\
: not known to have existed or happened before : very unusual
Full Definition of UNHEARD-OF
: previously unknown; especially : unprecedented <moving at unheard–of speeds>
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First Known Use of UNHEARD-OF
1592
Related to UNHEARD-OF
- Synonyms
- fresh, novel, original, strange, unaccustomed, unfamiliar, unheard-of, unknown, unprecedented
- Antonyms
- familiar, hackneyed, old, time-honored, tired, warmed-over
UNHEARD-OF Defined for Kids
unheard–of
adjective un·heard–of \ˌən-ˈhərd-ˌəv, -ˌäv\
Definition of UNHEARD-OF for Kids
: not known before <an unheard-of invention>
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