Completion; perfection; accomplishment — the state or act of something being finished or brought to its intended form.
新しい図書館の建設がついに完成した。
The construction of the new library has finally been completed.
プロジェクト完成まであと一週間だ。
There is one week left until the project's completion.
作品の完成を祝って小さなパーティーを開いた。
We held a small party to celebrate the completion of the work.