To come or go into; pass into the inside or interior of; get into, or come within, in any manner: as, to enter a house, a harbor, or a country; a sudden thought entered his mind.To penetrate into; pass through the outer portion or surface of; pierce: as, the post entered the soil to the depth of a foot.To go inside of; pass through or beyond: as, I forbid you to enter my doors.To begin upon; make a beginning of; take the first step in; initiate: as, the youth has entered his tenth year; to enter a new stage in a journey.To engage or become involved in; enlist in; join; become a member of: as, to enter the legal profession, the military service or army, an association or society, a university, or a college.To initiate into a business, service, society, or method; introduce.To insert; put or set in: as, to enter a wedge; to enter a tenon in a mortise; to enter a fabric to be dyed into the dye-bath.To set down in writing; make a record of; enroll; inscribe: as, the clerk entered the account or charge in the journal.To cause to be inscribed or enrolled; offer for admission, reception, or competition: as, to enter one's son or one's self at college; to enter a friend's name at a club; to enter a horse for a race.To report at the custom-house, as a vessel on arrival in port, by delivering a manifest: as, to enter a ship or her cargo.In law: To go in or upon and take possession of, as lands. See entry.To place in regular form before a court; place upon the records of a court: as, to enter a writ, an order, or an appearance.To set on game; specifically, of young dogs, to set on game for the first time.To make an entrance, entry, or ingress; pass to the interior; go or come from without inward: used absolutely or with in, into, on, or upon. See phrases below.Specifically To appear upon the stage; come into view: said of personages in a drama, or of actors: as, enter Lady Macbeth, reading a letter.To begin; make beginning.To engage in: as, to enter into business.To be or become initiated in; comprehend.To deal with or treat fully of, as a subject, by way of discussion, argument, and the like; make inquiry or scrutiny into; examine.To be an ingredient in; form a constituent part in: as, lead enters into the composition of pewter.To begin to treat or deal with, as a subject, by way of discussion, argument, and the like.See inter.An obsolete form of entire.A prefix immediately of French origin, but ultimately of Latin origin, signifying ‘between’: same as inter-.