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[in-val-yoo-uh-buh l] /ɪnˈvæl yu ə bəl/
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 forms
invaluableness, noun
invaluably, adverb
worthless. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for invaluable
  • Priceless may either mean invaluable or of no value.
  • The results can be startlingly accurate and have proved invaluable in rescuing missing children.
  • The area's immense variety of fish and resistance to coral bleaching make it an invaluable marine wilderness.
  • Learn how technology today can help protect this invaluable resource.
  • Such adaptive traits are invaluable not only to local farmers but also to commercial breeders elsewhere in the world.
  • In the face of all that disbelief, having that support network was invaluable.
  • Pocket-pack tissues and wet wipes are invaluable for public toilets.
  • Marriage, quite aside from parentage, also gives two people invaluable experience.
  • The testing on these animals is both cruel and invaluable.
  • To me that is invaluable and explains why people stand by and let others come to harm.
British Dictionary definitions for invaluable


having great value that is impossible to calculate; priceless
Derived Forms
invaluableness, noun
invaluably, 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
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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
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