- 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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for invaluably
Online Etymology Dictionary, © 2010 Douglas Harper