beyond calculable or appraisable value; of inestimable worth; priceless: an invaluable art collection; her invaluable assistance.

Origin of invaluable

1570–80; in-3 + valuable, in obsolete sense “capable of valuation”
Related formsin·val·u·a·ble·ness, nounin·val·u·a·bly, adverb

Synonyms for invaluable

Antonyms for invaluable Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for invaluable

Contemporary Examples of invaluable

Historical Examples of invaluable

British Dictionary definitions for invaluable



having great value that is impossible to calculate; priceless
Derived Formsinvaluableness, nouninvaluably, adverb
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 invaluable

1570s, "above value," from in- (1) "not" + value (v.) "estimate the worth of" + -able. It also has been used in a sense "without value, worthless" (1630s).

Online Etymology Dictionary, © 2010 Douglas Harper