What is the meaning of Customer?

A habitual patron, regular purchaser, returning client; a person or company who has a custom of buying from a particular business.

A patron, a client; a person or company who purchases or receives a product or service from a business or merchant, or intends to do so.

A person, especially one engaging in some sort of interaction with others.

A native official who exacted customs duties.

Source: wiktionary.org