1. Noun

   volume (sound level)

   ラジオが大きすぎるからもっとボリュームを下げなさい。

2. volume; bulk; mass; (substantial) amount; quantity

3. volume (book)

4. volume (storage area)

   Computing

5. potentiometer; variable resistor

   also written as ボリウム

Also written ヴォリュームvuoryuumu、ボリウムboriumu