1. having no function; serving no practical purpose

Examples

• The old decorative buttons on the coat were functionless; they were purely ornamental.
• He removed the functionless parts from the machine to reduce weight.
• The committee decided the functionless department should be eliminated.
• These functionless features were added to the software but never actually used.
• The architect criticized the design for including functionless architectural elements.
• After the upgrade, the legacy code became functionless and was deleted.