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n(1)拱(洞)(curved structure supporting the weight of sth above it，as under a bridge or above a door)[C]：A～es form the tops of doors，windows and gateways.拱門可作門、窗和門道的頂。The bridge had 7～es.那座橋有七個(gè)橋拱。a railway～鐵路拱洞;The～of the ceiling spans 30 meters.拱形天棚跨度有30米。an old～bridge 一座舊拱橋;

(2)拱道(門)(doorway or gateway having similar structure;monument built in the way)[C](=archway)：go through the～穿過(guò)拱門;a triumphal～凱旋門;

(3)拱形物;足底弓(thing shaped like an arch，esp the middle of the bottom of the foot)[C]：the～of the heavens/the foot/the rainbow 蒼穹/足弓/彎彎的彩虹;Her eyebrows have a naturally high～.她的雙眉自然地高高彎起?！纪絚urve，bend，bow-shape;〖反〗straightness;

v(1)拱起(form a curved shape or line)[T+n]：(cat/person)～its/his back (貓/人)拱起背;(horse)～its neck(馬)勾起脖子;〖同〗curve，bend;〖反〗 straighten;

(2)形成拱(弓)形伸過(guò)(extend in an arch across sth)[I+prep(across/over)]：The trees～ed over the path.樹(shù)木成拱門狀掩罩著小徑。The tree/bridge～es across the river.那棵樹(shù)呈弓形伸至河對(duì)岸/那座拱形橋跨越河面?！纪絚urve，bend，span