vt.

1. 進入
   He entered the classroom.

   他進了教室。

2. 參加；加入
   The United States did not enter the war until April 19, 1917.

   美國直到一九一七年四月十九日才參戰。

3. 使參加；使進入
   They entered their child at a private school.

   他們讓他們的孩子在一所私立學校就讀。

4. 開始從事；開始進入
   He entered politics at the age of 30.

   他三十歲開始從政。

5. 登錄；將……輸入
   He showed me how to enter data into the computer.

   他告訴我如何將數據輸入電腦。

vi.

1. 進入
   He rose as she entered.

   他在她進來時站起身來。

2. 參加，加入[（+for）]
   He decided not to enter for the race.

   他決定不報名參加比賽。

v.

1. come or go into (a place).
   ▸penetrate:

   the bullet entered his stomach.
   ▸ (enter on/upon) Law  (as a legal entitlement) go freely into (property) as or as if the owner.
2. (often enter into) begin to be involved in.
   ▸ (enter on/upon) begin (an activity or job).
   ▸join (an institution or profession).
   ▸register as a competitor or participant in.
   ▸register (someone) in a competition or examination.
   ▸ (enter into) undertake to bind oneself by (an agreement).
3. write or key (information) in a book, computer, etc.
4. Law  submit (a statement) in an official capacity, usually in a court of law.