come or go into (a place)

she entered the kitchen

the door opened and Karl entered

begin to be involved in

in 1941 America entered the war

in recent years banks and insurance companies have entered the market

write or key (information) in a book, computer, etc.

children can enter the data into the computer

submit (a statement) in an official capacity

a solicitor entered a plea of guilty on her behalf

a key on a computer keyboard which is used to perform various functions, such as executing a command or selecting options on a menu