expression, godan verb (-tsu)
put an end to; bring to a close; close the books on
Idiomatic expression meaning to decisively end something, often a long-standing matter or relationship. The literal meaning is 'to put a period (at the end of a sentence)', but it is almost always used figuratively. Similar to 終止符を打つ.
See also: 終止符を打つ
We were finally able to put an end to the long negotiations.
彼は過去の恋愛にピリオドを打って、新しい人生を始めた。
He put an end to his past romance and started a new life.