Dictionary.com
Thesaurus.com
Synonyms

epochal

American  
[ep-uh-kuhl, ee-po-] / ˈɛp ə kəl, ˈi pɒ- /

adjective

  1. of, relating to, or of the nature of an epoch.

  2. extremely important, significant, or influential.


Other Word Forms

Etymology

Origin of epochal

First recorded in 1675–85; epoch + -al 1

Explanation

Epochal describes events so important and significant they have the power to usher in a new epoch. In other words they're "epoch-making." The big bang. The moment when man learned to make fire. The day your braces were removed. These events are epochal in that they mark the dawn of a new era, or epoch, of time. Both epoch and epochal derive from the Latin epocha, which in turn derives from the Greek epekhein, which combines epi "on" with ekhein "to hold," and means to pause or take up a position. Think of epochal events as worthy of an arrow on the timeline of history.

Keep Reading on Vocabulary.com

Vocabulary lists containing epochal

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.

See Examples For:

Mr. Turturro exudes the bleary exhaustion of a man nursing an epochal hangover.

From The Wall Street Journal ● Aug. 26, 2026

Going much further back, oil prices also rocketed during the epochal crisis of World War II in the 1940s.

From MarketWatch ● Feb. 20, 2026

He befriended the Clash on a tour of London and sat in on the band’s sessions recording their epochal “London Calling” LP.

From Los Angeles Times ● Dec. 16, 2025

For a cricket-mad nation long waiting for its women to stand shoulder to shoulder with its men, this triumph felt epochal - the spark of a new era.

From BBC ● Nov. 3, 2025

Lieutenant Scheisskopf unveiled his epochal surprise that Sunday with all the aplomb of an experienced impresario.

From "Catch-22" by Joseph Heller

Vocabulary.com logo
by dictionary.com

Just like flashcards, but way more fun

Don't take our word for it. Leave the boring studying behind and join VocabTrainer today. You'll learn even faster and never look back.

Take me to Vocabulary.com