a means of approaching or entering a place.

the staircase gives access to the top floor

an attack or outburst of an emotion.

I was suddenly overcome with an access of rage

approach or enter (a place).

single rooms have private baths accessed via the balcony

obtain, examine, or retrieve (data or a file).

The lack of protection means that e-mails and sensitive computer files can be accessed by hackers using little more than a laptop and an antenna.