Arrangement, Sorting, Organization, Adjustment
noun, verbal noun
When you arrange something according to reason, the result is an arrangement.
せいり
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.
このアパートの住民の部屋はみんなきちんと整理されています。
This apartment's residents' rooms are all neatly arranged.
まだ考えがちゃんと整理できていません。
I have not yet properly organized my thoughts.
今日はスマホのフォトライブラリーを整理しました。
Today I organized the photo library on my phone.