1. volume (sound level)

noun (common) (futsuumeishi)

2. volume (books)

noun (common) (futsuumeishi)

3. volume, substantial quantity (e.g. hearty meal), bulk, bulkiness, mass

noun (common) (futsuumeishi)

4. any kind of adjustment knob, not necessarily for sound

noun (common) (futsuumeishi)