- beyond calculable or appraisable value; of inestimable worth; priceless: an invaluable art collection; her invaluable assistance.
Origin of invaluable
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- having great value that is impossible to calculate; priceless
Word Origin and History for invaluably
Online Etymology Dictionary, © 2010 Douglas Harper