1. operating or functioning without a client; not requiring or using a client application or interface
Usage: computing/technology term; often used in contrast to client-server architecture
2. having no clients; without customers or patrons
Usage: business/professional context

Examples

• The company developed a clientless application that runs entirely on the server.
• A clientless architecture reduces the need for software installation on user devices.
• The startup remained clientless for months before landing its first major contract.
• Clientless computing environments can simplify system administration and updates.
• After losing their primary account, the firm found itself temporarily clientless.