Historic means important enough to be remembered in history. A historic decision, a historic building, a historic moment.
It is worth keeping apart from historical, which simply means to do with the past: every old building is historical and only a few are historic. Announcing a moment as historic while it is happening is usually wrong.
1adjectivehistoricImportant enough to be remembered in history.
“The fall of the Berlin Wall in 1989 was a historic moment for Europe.”
historic is a quality of importance.
Latin historicus comes from Greek historikos, from historia, an inquiry or account.
Latin
historicus
English, today
historic
From Latin historicus. From Latin historicus (“historical”), from Ancient Greek ἱστορικός (“exact; historical”). Cognate with French historique. by surface analysis, history + -ic.
Etymology from Wiktionary, CC BY-SA