1. not in working condition; not able to be used

Examples

• The old computer became unserviceable after the hard drive failed.
• Military equipment that is unserviceable must be repaired or replaced immediately.
• The mechanic declared the car’s engine unserviceable due to extensive damage.
• After years of heavy use, the machinery was deemed unserviceable.
• The torn parachute was unserviceable and had to be discarded.
• Weather conditions made the runway unserviceable for aircraft landings.