1Extra; surplus — more than what is needed, or the part left over unused. Used as a noun, or as '余分な' (extra, superfluous) before a noun.
余分な荷物はホテルに預けておいた。
I left my extra luggage at the hotel.
予算に余分があれば、新しいプロジェクトに使いたい。
If there is extra budget, I'd like to use it for a new project.
ケーキは一切れ余分に買っておいた。
I bought one extra slice of cake, just in case.
説明が長すぎて、余分な話が多かった。
The explanation was too long and had too much unnecessary talk.