noun
biography; life story
A written account of a person's life, often a full-length biography. Can be used for both historical and contemporary figures.
彼は歴史上の人物の一代記を書いた。
He wrote a biography of a historical figure.
この一代記は彼女の生涯を詳しく描いている。
This biography depicts her life in detail.
Compound of 一代 (one generation, lifetime) and 記 (record, chronicle). The word literally means 'record of one lifetime'.