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completion; conclusion
perfect (tense)
「完了」 has another reading with different meanings.
end; completion
作業さぎょうの完了かんりょうを報告ほうこくさせていただきます。
I'll get to report the completion of work.
予定よてい通りとおりに完了かんりょうできた。
It was completed on schedule.
完了かんりょうしたらすぐ連絡れんらくしてくださいね。
Please contact me as soon as it's done.