unprecedented

[uhn-pres-i-den-tid] / ʌnˈprɛs ɪˌdɛn tɪd /

ADJECTIVE

exceptional, original

Synonyms

STRONGEST

bizarre extraordinary fantastic miraculous new remarkable singular uncommon unheard-of unique unparalleled unrivaled unusual

WEAK

aberrant abnormal anomalous eccentric exotic freakish idiosyncratic marvelous modern newfangled novel odd out-of-the-way outlandish outre outré preternatural prodigious signal sui generis unexampled

Antonyms

STRONGEST

bad common commonplace customary familiar normal ordinary poor regular standard usual

WEAK

known unexceptional unremarkable

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

In terms of a practical response, the Palace has already taken unprecedented action in how it stripped the former Prince Andrew of his titles and removed him from his home.

From BBC • Apr. 10, 2026

Even when Ohtani has been available, his teams have treated himi with extreme caution, often giving him extra rest between appearances to help him recover from his unprecedented training regimen.

From The Wall Street Journal • Apr. 10, 2026

The Artemis II astronauts conducted a historic lunar flyby, gathered invaluable data and took in unprecedented Moon views, but one of the most crucial moments of their 10-day mission is still to come: Friday's splashdown.

From Barron's • Apr. 10, 2026

Leo was among the shocked, taking the unprecedented step to urge Americans to “communicate with congressmen” that “we don’t want war; we want peace.”

From Salon • Apr. 9, 2026

For the highly secretive Soviet government, a leadership merry-go-round like this was unprecedented: In the entire history of the USSR, only four men had occupied the leadership post.

From "Spies: The Secret Showdown Between America and Russia" by Marc Favreau

Vocabulary lists containing unprecedented

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