Definition of enter verb from the Oxford Advanced Learner's Dictionary. [intransitive, transitive] (not usually used in the passive) (formal) to come or go into something. Knock before you enter. Enter Hamlet (= for example as stage directions in the text of a play). enter something Someone entered the room behind me. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.