What does 体积 (tǐ jī) mean in English?

Card 952HSK 2010 Level 5952/1311
CARD952
PROGRESS73%
体积
体體
tǐ jī
volume; bulk; CL:個|个[ge4]

Reveal: Click/Space/Enter/↑↓/w/s/j/kNavigate: ←→/h/l/a/d