na-adjective
voluminous; bulky; hearty; filling
Colloquial wasei-eigo used for hair, clothing, or meals that are impressively large, full, or generous in volume.
wasei-eigo (Japanese-coined English), from volume + y
This perm made my hair really voluminous.
ランチにあの店のボリューミーなハンバーグを食べた。
I had that restaurant's hearty hamburg steak for lunch.