1. extremely useful or valuable; priceless

Examples

• Her experience as a teacher made her an invaluable member of the curriculum committee.
• The old photographs were invaluable to the historian researching the town’s past.
• His advice proved invaluable when I was starting my business.
• The museum’s collection contains invaluable artifacts from ancient civilizations.
• She provided invaluable assistance during the emergency.
• The research data will be invaluable for future studies.