From Longman Dictionary of Contemporary Englishbus passˈbus pass noun [countable] TTCa special ticket giving cheap or free bus travel
Examples from the Corpus
bus pass• Bus pass reprieve: Langbaurgh pensioners' free bus passes have been given a reprieve until the end of April.• I can't even get a bus pass.• I got a social worker and she suggested I get a bus pass, so I could get to town.• All the aggravation about replacing by bus pass, credit cards and library cards etc, all because I was thoughtless. 