The preceding year; last year (relative to a referenced year).
前年と比べて売上が10%増加した。
Sales increased by 10% compared to the previous year.
前年のデータをもとに予算を立てる。
We will prepare the budget based on data from the previous year.
前年に完成したプロジェクトは現在も稼働中だ。
The project completed last year is still in operation.