- come or go into (a place)进入（某地方）：
with obj. she entered the kitchen她进了厨房
no obj. the door opened and Karl entered门开了, 卡尔走了进来
figurative 〈喻〉reading the Bible, we enter into an amazing new world of thoughts.
读着《圣经》, 我们随即进入了一个令人惊奇的全新的思想境界。
- no obj. used as a stage direction to indicate when a character comes on stage舞台指示用语登场, 上场：
enter Hamlet.
哈姆雷特上场。
- with obj. penetrate (something)穿透, 刺入：
the bullet entered his stomach.
子弹射入了他的腹部。
- with obj.(of a man) insert the penis into the vagina of (a woman)（男人）将阴茎插入（女人）的阴道。
- with obj. come or be introduced into进入; 被引入：
the thought never entered my head.
我从未有过这种想法。
- with obj. begin to be involved in开始卷入, 参与：
in 1941 America entered the war.
1941年美国参战。
- become a member of or start working in (an institution or profession)成为…的一员, 加入; 开始从事; 开始在…中工作：
that autumn, he entered Port Talbot Secondary School.
那年秋天, 他进入塔尔伯特港中学工作。
- register as a competitor or participant in (a tournament, race, or examination)参加（比赛, 考试）。
- register (a person, animal, or thing) to compete or participate in a tournament, race, or examination使（人, 动物, 东西）参加比赛（或考试）。
- start or reach (a stage or period of time) in an activity or situation使开始, 达到（某一阶段或时期）：
the election campaign entered its final phase.
竞选进入最后阶段。
- no obj.(of a particular performer in an ensemble) start or resume playing or singing（剧团的某个演出者）开始（或重新开始）演奏（或演唱）。
- write or key (information) in a book, computer, etc. so as to record it写入, 输入（信息）, 录入：
children can enter the data into the computer.
孩子能够把数据输入电脑。
- Law submit (a statement) in an official capacity, usually in a court of law【律】（通常在法庭上）正式提交（声明）：
a solicitor entered a plea of guilty on her behalf.
一位律师代表她正式表示认罪。
- a key on a computer keyboard which is used to perform various functions, such as executing a command or selecting options on a menu（计算机键盘上的）回车键。
enter into
- become involved in (an activity, situation, or matter)参与, 卷入（活动, 境况, 事件）：
they have entered into a relationship.
他们已发生了某种浪漫关系。
- undertake to bind oneself by (an agreement or other commitment)开始受（协议或其他承诺）的约束：
the council entered into an agreement with a private firm.
政务委员会与一家私人公司达成了一项协议。
- form part of or be a factor in构成…的一部分; 是…的因素：
medical ethics also enter into the question.
医德也成了问题的一部分。
enter on/upon
- formal begin (an activity or job); start to pursue (a particular course in life)〈正式〉着手（活动, 工作）; 开始（生活道路）：
he entered upon a turbulent political career.
他开始了动荡不定的政治生涯。
- Law (as a legal entitlement) go freely into property as or as if the owner【律】（作为法定的权利）正式占有。