What does epochal mean?
"Epochal" is a formal adjective used to describe events, discoveries, works, or changes so significant that they mark the start of a new era. When historians call the printing press an epochal invention, they mean it did not merely matter — it divided history into a "before" and an "after." The word derives from "epoch," which traces back through Latin to the Greek epokhē, meaning a pause or fixed point from which time is measured. In modern usage, epochal appears most often in phrases such as "epochal event," "epochal change," and "epochal moment," typically in academic, historical, and journalistic contexts. It conveys strong approval and gravity, implying lasting rather than fleeting significance. Because of its weight, writers should reserve it for truly transformative occurrences. Closely related words like "historic" and "momentous" overlap in meaning, but "epochal" uniquely emphasizes the sense of an era being inaugurated.
Of very great significance; marking the start of a new era.
"The invention of the internet was an epochal development in human communication."
Often used attributively before nouns, as in "an epochal decision" or "epochal significance."
Relating to or characteristic of an epoch or epochs.
"The geologists studied epochal boundaries in the rock strata."
This technical sense appears mainly in geology and other scientific disciplines concerned with divisions of time.
Every 'epochal' event literally names itself after a fixed point in time — the ancient Greek word for the pause that begins a new age.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of epochal
"Epochal" derives from "epoch," which comes via French époque and medieval Latin epocha from the Greek epokhē, meaning "a pause" or "a fixed point of time," formed from epein, "to hold back." In astronomy, an epoch was originally a fixed point from which measurements of time were reckoned, and the word broadened to mean any distinct period marked by notable characteristics. The adjective "epochal" arose in English during the nineteenth century, when "epoch-making" and "epochal" were both coined to describe things that inaugurate a new era.
Related word forms
How epochal is actually used
"Epochal" is a formal word, most at home in historical, academic, and journalistic writing. It carries strongly positive connotations of importance and lasting consequence, so it should be reserved for genuinely significant events — overuse can sound hyperbolic. It is considerably more common in American English than British English.
Easily confused with epochal
'Epical' relates to epic poetry or epic-like grandeur, while 'epochal' refers to something marking a new era in history.