n (1) 门(窗)闩(销) (sliding metal bar to fasten a door or window)[C]：Is the～on the door closed? 门闩插上了吗? fit a～装上插销;〖同〗bar，fastener，rod，lock;

(2) 螺钉(栓) (thick round bar of metal， often with a screw thread for a nut， to hold things together)[C]：The engine is held in place by two strong～s.机器用两个强劲的螺栓固定住了。nuts and～s螺母和螺钉;The～s are all tight enough.这些螺栓都够紧的。

(3) 箭，矢 ((in former times) short heavy arrow shot from a crossbow)[C];

(4) 电闪 (flash of lighting)[C]：A～of lighting lit up the sky.一个闪电把天空照亮。It came like a～from the sky. 这如同晴天闪电来得很突然。〖同〗flash;

(5) 一疋(卷)布(large roll of cloth， etc)[C]：It took two～s of cloth/silk to make the draperies.做那些帐帘用了两匹布/丝绸。〖同〗roll;

v (1) 闩(住)((cause to) lock with a bolt)[T+n，I]：～a door/a window闩住门/窗;～sb out/in 把……闩在外边/里面;The door/gate～s on the inside.这门/大门从里面闩。The door～s with difficulty.这门很难闩上。〖同〗bar，lock，fasten;〖反〗unbolt，unbar，unlock，unfasten;

(2) 用螺栓拴住((cause to) fasten with a bolt)[T+n+prep (to)， T+n+adv (together)， I+adv (together)]：～a rack to the wall 把支架固定在墙上;an iron cot～ed to the floor固定在地板上的铁床铺;These two metal parts～together.这两个金属部件能用螺栓拧在一起。～the two parts together把这两个部件用螺栓拧在一起