What does 活动 (huó dòng) mean in English?

Card 179HSK 2010 Level 4179/586
CARD179
PROGRESS31%
活动
活動
huó dòng
to exercise; to move about; to operate; activity; loose; shaky; active; movable; maneuver; to use connections; CL:項|项[xiang4],個|个[ge4]

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