/ ˈklaɪənt; NAmE / noun
1.
a person who uses the services or advice of a professional person or organization :
a lawyer with many famous clients
to act on behalf of a client
Social workers must always consider the best interests of their clients.
2.
( computing ) a computer that is linked to a server
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WORD ORIGIN
late Middle English : from Latin cliens , client- , variant of cluens heeding, from cluere hear or obey. The term originally denoted a person under the protection and patronage of another, hence a person “protected” by a legal adviser (sense 1).