somebody who engages or receives the advice or services of a professional person or organization
a customer
in computing, a computer or workstation to which data is provided by a server
in computing, a program used to contact another computer or a network and request data from it
a person, state, etc under the protection of another
client states
a plebeian in ancient Rome who was granted protection by a patron
clientage /-tij/ noun
cliental /klieʹentl, ʹklie·əntl/ adj
[Middle English via French from Latin client-, cliens, client, dependent, ultimately from cluere to obey]