customer

noun

cus·​tom·​er ˈkə-stə-mər 

1

: one that purchases a commodity or service

The customer used a credit card for the purchase.

2

: an individual usually having some specified distinctive trait

a real tough customer

… let me give you the advice of an old and world-weary customer.

—Flannery O'Connor

Synonyms of customer

• client
• patron
• guest

Examples of customer in a Sentence

She is one of our best customers.

She's a pretty cool customer.

Recent Examples on the Web

The potential rollout comes as the chain increases its use of technology to streamline operations while maintaining strong customer demand, Newsweek reported. —Natassia Paloma, USA Today, 12 May 2026

Quince does some online advertising but the bulk of its customers discover the site through word-of-mouth. —Jean E. Palmieri, Footwear News, 11 May 2026

Companies will test the boundaries Boyden speculated that offering different prices based on how much a customer uses a service, or advertising in particular ways to entice customers who are more likely to infringe, might constitute tailoring a service for piracy. —ArsTechnica, 11 May 2026

Its customers include large financial institutions, including the global cryptocurrency exchange Kraken, and Dabitz says the bank is processing billions of euros, while growing 10x year over year. —Jeff John Roberts, Fortune, 11 May 2026

Word History

Etymology

Middle English custumer, from custume — see custom entry 1

First Known Use

15th century, in the meaning defined at sense 1

Phrases Containing customer

• cool customer
• customer base
• customer service
• paying customer
• regular customer

Kids Definition

customer

noun

cus·​tom·​er ˈkəs-tə-mər 

1

: one that buys a product or service

2

: individual entry 2 sense 2, fellow

he's a real tough customer

Legal Definition

customer

noun

cus·​to·​mer

1

: a person or business that purchases a commodity or service

2

a

: a person or entity having an account with a bank or on whose behalf the bank has agreed to collect items

b

: a person or entity for whom an issuer issues a letter of credit