A2 a person who buys goods or a service顾客，主顾，客户
Would you mind waiting? I'm dealing with another customer at the moment.
The chairman of the bank believes in the personal touch and always sends a signed letter to each customer.
The shop is giving away a sample pack to every customer.
Shops are being forced to put their prices down in order to attract customers.
Mrs Wilson is one of our regular customers.