Season Pass refers to a ticket attainable at most amusement parks allowing admission to the park multiple times during a certain period - usually a year. Season passes also are issued by ski areas.
Season Passes also gain access to theme parks like Six Flags and Cedar Fair. These passes allow you to enter the park many times as you want for the whole entire year. Some passes allow you to get free (or prepaid for the duration of the pass) parking, and free coupons to what non-holders couldn't do.
Season Pass can also refer to the term coined by the manufacturers of the TiVo personal video recorder for their function which allows a user to program the device to record all of the episodes of a series, even if their airings are rescheduled or pre-empted.
Similar functions are available on competitive 'PVR' systems and software packages such as ReplayTV and IceTV.
Seasons Passes are often available for sporting events too.