■ adjective
1》 famous or important in history, or potentially so.
↘ archaic of the past.
2》 Grammar (of a tense) used in the narration of past events, especially Latin and Greek imperfect and pluperfect.
Usage
Historic and ~al are used in slightly different ways. Historic means ‘famous or important in history’ ( a ~ occasion ), whereas ~al chiefly means ‘concerning history’ ( ~al evidence ).