1.
historical, relating to history
Pertaining to or connected with the study or events of the past.
この建物は歴史的に重要だ。
This building is historically important.
歴史的背景を理解する必要がある。
It's necessary to understand the historical background.
2.
historic, epoch-making
Of great significance in history, momentous.
歴史的な合意が成立した。
A historic agreement was reached.
歴史的 has two uses: describing something related to history, or emphasizing historical significance.
WORD FORMATION:
歴史 (history) + 的 (adjectival suffix)
FORMS:
- Na-adjective: 歴史的な + noun
- Adverb: 歴史的に
COMMON COLLOCATIONS:
- 歴史的建造物: historic building
- 歴史的事実: historical fact
- 歴史的背景: historical background
- 歴史的瞬間: historic moment
NUANCE:
Sense 1 (relating to history) is neutral. Sense 2 (historic/momentous) carries a positive or significant connotation.