A person who subscribes to a publication or a service(noun)
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Use "subscriber" in a sentence
"The term subscriber is commonly applied to the patron of the telephone service."
"The term subscriber's station equipment will refer to the complete equipment at a subscriber's station, and will include the telephone set, the interior wiring, and the protective devices, together with any other apparatus that may be associated with the telephone line and be located within the subscriber's premises."
"During the audit, the subscriber is asked to read information off the screen of each additional receiver."