(computing) closed-source
1.to switch one's microphone to "mute"2.(fig.) to go silent
closed interval (in calculus)
lock-up period (on stock options)
to have nothing further to do with a matter (idiom)
opening and closing ceremonies
封闭性开局封閉性開局 1.Closed Game2.Double Queen Pawn Opening (chess)3.same as 双后前兵开局
闭塞眼睛捉麻雀閉塞眼睛捉麻雀 1.lit. to catch sparrows blindfolded (idiom)2.fig. to act blindly