unforgettable

adjective

un·​for·​get·​ta·​ble ˌən-fər-ˈge-tə-bəl 

: incapable of being forgotten : memorable

an unforgettable experience

unforgettably

ˌən-fər-ˈge-tə-blē 

adverb

Synonyms of unforgettable

• memorable

Examples of unforgettable in a Sentence

an unforgettable evening of dining and dancing

Recent Examples on the Web

Getting to push yourself out of your comfort zone, see sprawling views of the Sierra Nevada and climb with kind, knowledgeable guides is an unforgettable experience. — Sacbee.com, 5 Sep. 2026

For a little girl who had spent years listening to Parton’s voice during some of her hardest days, the encounter was unforgettable. — Jordan Greene, PEOPLE, 4 Sep. 2026

Over the week-plus of the festival, expect stunning jewels, unforgettable couture, and picture-perfect moments aplenty. — Kase Wickman, Vanity Fair, 2 Sep. 2026

For a truly unforgettable endeavor, dive into a deep appreciation of the wonders of the underwater world on the Ocean Pearl, the resort’s mini submarine. — Condé Nast Traveler, 30 Aug. 2026

Word History

First Known Use

1806, in the meaning defined above

Rhymes for unforgettable

• forgettable
• regrettable
• wettable

Kids Definition

unforgettable

adjective

un·​for·​get·​ta·​ble ˌən-fər-ˈget-ə-bəl 

: not to be forgotten : lasting in memory

unforgettably

-blē 

adverb