1. lacking shine, brightness, or glossy appearance; dull
2. lacking vitality, energy, or brilliance; uninspiring

Examples

• The old car’s lusterless paint job made it look worn and neglected.
• Her hair appeared lusterless after months of chemical treatments.
• The actor gave a lusterless performance that failed to engage the audience.
• The lusterless metal surface needed polishing to restore its shine.
• His lusterless eyes showed no enthusiasm for the project.
• The lusterless finish on the furniture made it look cheap.
• After the illness, her once-vibrant personality seemed lusterless.