To penetrate; pierce: The bullet entered the victim's skull.
To introduce; insert: She entered the probe into the patient's artery.
a. To become a participant, member, or part of; join: too old to enter the army; entered the discussion at a crucial moment.
b. To gain admission to (a school, for example).
To cause to become a participant, member, or part of; enroll: entered the children in private school; entered dahlias in a flower show.
To embark on; begin: With Sputnik, the Soviet Union entered the space age.
To make a beginning in; take up: entered medicine.
To write or put in: entered our names in the guest book; enters the data into the computer.
To place formally on record; submit: enter a plea of innocence; enter a complaint.
To go to or occupy in order to claim possession of (land).
To report (a ship or cargo) to customs.
verb, intransitive
To come or go in; make an entry: As the President entered, the band played “Hail to the Chief.”
To effect penetration.
To become a member or participant.
Phrasal Verbs: enter into To participate in; take an active role or interest in: enter into politics; enter into negotiations. To become party to (a contract): The nations entered into a trade agreement. To become a component of; form a part of: Financial matters entered into the discussion. To consider; investigate: The report entered into the effect of high interest rates on the market.enter on/upon To set out on; begin: We enter on a new era in our history. To begin considering; take up: After discussing the budget deficit, they entered on the problem of raising taxes. To take possession of: She entered upon the estate of her uncle.