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

There were still jobs up for grabs, roster spots in question and even unforgettable debuts. — Zach Berman, New York Times, 16 Aug. 2026

The Coens won Best Original Screenplay, and Frances McDormand took her first Oscar home for playing the unforgettable Marge Gunderson, a Minnesotan cop who gets entangled in a car salesman’s deeply inept foray into the criminal world. — Brian Tallerico, Vulture, 13 Aug. 2026

Iceland hadn’t seen a total solar eclipse since 1954, and despite an imperfect forecast, 1 minute and 47 seconds of totality delivered an unforgettable experience. — Susmita Baral, Travel + Leisure, 13 Aug. 2026

Celebration turned to tragedy quickly A surprise birthday bash on a boat set the stage for unforgettable Saturday night. — Adi Guajardo, CBS News, 12 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