Customer/ˈkʌstəmər/ Definition 1 of 3Pro Tip 1/3Purchasing Power Understand 'customer' implies the power to choose where to buy. As a customer, you have the right to return defective products. Pro Tip 2/3Regular Visits 'Customer' often refers to someone who shops repeatedly at the same place. The coffee shop has many customers who come in daily. Pro Tip 3/3Impersonal Label The term doesn't imply a personal relationship, unlike 'client'. Supermarkets have thousands of customers they don't know personally.