/ˈentə(r) ||; ˈɛntɚ/verb1 [I,T] (formal 正式) to come or go into a place 进入: Don't enter without knocking. 先敲门再进去。They all stood up when he entered the room. 他进屋里的时候，他们全都站起来。 ☞nouns entrance and entry 名词为 entrance 及 entry
Note that enter is used without a preposition. Come into and go into are much more common. enter 后面不接介词。come into 和 go into 远较 enter 常用。 2 [T] to become a member of sth, especially a profession or an institution 加入（尤指行业或机构）: She entered the legal profession in 1998. 她1998年进入法律界。to enter school/college/university 进学校 / 学院 / 大学 ☞noun entrant 名词为 entrant
3 [T] to begin or become involved in an activity, a situation, etc 开始从事（活动）；陷入（情况）: When she entered the relationship, she had no idea he was already married. 她陷入这关系时，根本不知道他已经结婚。We have just entered a new phase in international relations. 在国际关系方面，我们刚刚进入一个新阶段。
4 [I,T] enter (for) sth;enter sb (in/for sth) to put your name or sb's name on the list for an exam, race, competition, etc 报名参加（考试、赛跑、比赛等）: I entered a competition in the Sunday paper and I won £20! 我参加了星期日报纸上的一项比赛，还赢了20英镑呢！
5 [T] enter sth (in/into/on/onto sth) to put names, numbers, details, etc in a list, book, computer, etc 把（姓名、数目、详情等）记入，登入（清单、本子、计算机等）: I've entered all the data onto the computer. 我已经把所有数据输入计算机。Enter your password and press return. 输入你的密码，然后按返回键。
enter into sth 1 to start to think or talk about sth 想起；谈起: I don't want to enter into details now. 我暂且不想谈细节。
2 to be part of sth; to be involved in sth 成为…的一部份；跟…有牵连: This is a business matter. Friendship doesn't enter into it. 这是做买卖，没有什么交情可讲的。
enter into sth (with sb) to begin sth （与某人）开始进行（某事）:
The government has entered into negotiations with the unions. 政府已经开始跟工会谈判。