clientcli·ent /ˈklaɪənt/ noun [countableC]1COMMERCEsomeone who pays for services or advice from a professional person or organizationIt is one of the stockbroking firm’s biggest corporate clients (=clients that are companies).
Defence lawyer Ronald Cole said his client was suffering from deep depression.
2COMMERCEsomeone who buys something from a sellerSYN CUSTOMERMost of the shop’s regular clients are men.
3COMPUTING a computer connected to another computer that controls it, for example in a NETWORK → compare server