What does 窗口 (chuāngkǒu) mean in English?

Card 250HSK Level 3250/2202
CARD250
PROGRESS11%
窗口
chuāngkǒu
window(Noun)
Click to reveal
← Previous↑ DeckNext →

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