What does 空闲 (kòng xián) mean in English?

Card 577HSK 2010 Level 5577/1311
CARD577
PROGRESS44%
空闲
空閑
kòng xián
idle; free time; leisure
Click to reveal
← Previous↑ DeckNext →

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