unheard-of Definition
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unheard-of
adj
- 1. Not known to have ever happened or been done before; unprecedented.
- Thesaurus: unprecedented, unique, new, novel; unimaginable, unthinkable, outrageous, disgraceful, shocking, preposterous, unbelievable; Antonym: normal, usual, acceptable.
- Example: an unheard-of comedian
