Fetching details from the dictionary...

to remain; to be left over; to be in excess; to be too many
料理を作りすぎて余ったので冷蔵庫に入れた。
I made too much food and there was some left.
予算が余って、残りは来月に回すことにした。
The budget was left over, so we decided to carry the remainder over to next month.
会議室の椅子が三脚余っている。
There are three extra chairs in the meeting room.