Completion, Complete, Finish, Conclusion
noun, verbal noun, の adjective
A perfect finish is when everything is at total completion. Nothing is left over and all is done.
かんりょう
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
作戦完了!
Mission complete!
注文完了したよ!
I completed the order!
まずはこのアプリのインストールを完了させてください。
First, please complete the installation of this app.