n (1)通路，开(豁)口，孔，洞，空地(way in or out;hole;clear or open space)[C][N(in)]：an～in the hedge/fence/wall/forest/clouds 篱笆上的豁口/围栏上的豁口/墙上的洞/林中空地/云中的缝隙;〖同〗break，gap，hole;〖反〗obstruction，blockage;

(2)开始(端)(beginning)[C，尤sing]：the～of a debate/book/film 争论的开始/书的开头/影片的开头;an～to new negotiations重新谈判的开始;This is a natural～for a narrative.这是记叙文惯常的开篇。

(3)(打，张)开(act or process of becoming，making sth open)[U，the～]：the～of a door/map/flower/one's eyes/new library 门的开启/打开地图/鲜花开放/眼睛睁开/新图书馆的开馆;

(4)开幕(张，业)庆典(ceremony to mark the beginning of business in(a public building，etc))[C]：attend the～of the new theatre/bridge 出席新剧场开业庆典/新桥落成典礼;The～of the highway is scheduled for next year.该公路定于明年正式开放使用。grand opening 开业大吉;〖同〗initiation，launching，beginning，start;〖反〗closing，close，end，finish;

(5)(职位的)空缺(opportunity of a job)[C][N(at/in)]：There is an～in this firm for a production manager.这家公司有一个生产经理的空缺。That school has an～for an English teacher.那所学校有一个英语教师的空缺。〖同〗vacancy;

(6)良机，有利的环境(good opportunity to do sth;favourable conditions)[C][N(for)]：good～s for trade 作生意的大好时机;She provided me with an～.她给我提供了一个好机会。In talking with your mother，I made an～to ask her about that.在和你母亲的谈话中，我找机会问了她那件事。As soon as I saw an～I landed a blow on his head.我瞅准机会，一拳打在他头上。

adj 首先的，第一个的(first)[作attrib]：～night(戏剧或电影的)首次夜(晚)场演出;the chairman's～remarks/words at a meeting 主席在会议上的开场白;the～stages of fighting/of a film 战斗的序幕/电影的开始镜头;breathe the smelling of the～flowers 嗅闻花开的芳香;

→′opening-time 开始营业的时间