Definition of customer
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
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Merriam-Webster unabridged
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Time Traveler for customer
The first known use of customer was in the 15th century
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