Something that is historic is important in history, or likely to be considered important at some time in the future.
双语例句
例： the historic changes in Eastern Europe.
东欧有历史性意义的变化。
例： The opening of the Scottish Parliament was a historic moment.
苏格兰议会的开幕是一个有重要历史意义的时刻。
例： a fourth historic election victory.
第四次有重要历史意义的选举胜利。