n the right to enter
n the right to obtain or make use of or take advantage of something (as services or membership)
n a way of entering or leaving
n a code (a series of characters or digits) that must be entered in some way (typed or dialed or spoken) to get the use of something (a telephone line or a computer or a local area network etc.)
n (computer science) the operation of reading or writing stored information
n the act of approaching or entering
v obtain or retrieve from a storage device; as of information on a computer
v reach or gain access to