maincustomer
nounUK /ˌmeɪnˈkʌstəmə/
US /ˌmeɪnˈkʌstəmər/
The main customer is the most important person who buys things from a shop or company.
The bakery's main customer buys bread there every morning.
OTHER MEANINGS
2. The biggest or most frequent buyer of a company's products.
That supermarket chain is our main customer for milk.
3. The person a business depends on most for money.
Losing their main customer would hurt the small factory.
4. The most important guest or user of a service.
The hotel treats its main customer like family.