Nouns

(n)accessthe right to obtain or make use of or take advantage of something (as services or membership)
(n)access, approacha way of entering or leaving“he took a wrong turn on the access to the bridge”
(n)access, access codea 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)access, memory access(computer science) the operation of reading or writing stored information
(n)accessthe act of approaching or entering“he gained access to the building”

Verbs

(v)accessobtain or retrieve from a storage device; as of information on a computer
(v)access, get atreach or gain access to“How does one access the attic in this house?”, “I cannot get to the T.V. antenna, even if I climb on the roof”