1. so valuable that no price can be set; invaluable
2. extremely amusing or absurd
Usage: informal

Examples

• The museum’s collection of ancient artifacts is priceless.
• Her grandmother’s wedding ring is priceless to her.
• The priceless painting was stolen from the gallery.
• His expression when he saw the surprise was priceless.
• The comedian’s priceless reaction had everyone laughing.
• These family photos are priceless memories.
• The look on his face was absolutely priceless.