遮しゃ断だん桿かんしゃだんかんMeanings1noungate arm; barrier armrailwaySpecifically the movable arm at a railway crossing that lowers to block traffic.遮しゃ断だん桿かんが下おりている間あいだは線せん路ろを渡わたってはいけません。Do not cross the tracks while the gate arm is down.
