( customer bases)
A business’s customer base is all its regular customers, considered as a group. ( BUSINESS )
...Halifax’s customer base of 21 million people.
N-COUNT
CUSTOMER BASE
Meaning of CUSTOMER BASE in English
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006