Definition, Meaning & Synonyms
unheard-of
adjective
/ʌnˈhɜːrd əv/

Definition
Something that is so unusual, extraordinary, or surprising that it has never been known or experienced before.

Examples
- It was an unheard-of achievement for a team of rookies to win the championship.
- The sudden drop in temperatures was unheard-of for this time of year.

Meaning
The term ‘unheard-of’ refers to something that is not known or familiar to anyone; it signifies a level of rarity or unprecedented nature.

Synonyms
- Unprecedented
- Remarkable
- Unusual