1. Having importance in or influence on past events.
2. Belonging to the past; of what is important or famous in the past.

Historic and historicall have different applications, although their senses overlap.

Historic refers to what is important in history: "the historic first voyage to the moon". It is also refers to what is famous or interesting because of its association with certain people or special events in history: "a historic house".

Historical refers to whatever existed in the past, whether regarded as important or not: "a minor historical character". Historical also refers to anything concerned with history or the study of the past: "a historical novel; historical discoveries".

While these distinctions are useful, these words are often used interchangeably, as in historic times or historical times.