Definition of subscriber noun from the Oxford Advanced American Dictionary

subscriber

noun
/səbˈskraɪbər/
 
 
1 a person who pays money, usually once a year, to receive regular copies of a magazine or newspapersubscribers to “New Scientist”2 a person who pays to receive a servicesubscribers to cable television3 a person who gives money regularly to help the work of an organization such as a charity