What does 共同 (gòng tóng) mean in English?

Card 137HSK 2010 Level 4137/586
CARD137
PROGRESS23%
共同
共衕
gòng tóng
common; joint; jointly; together; collaborative

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