invaluable - definition of invaluable - synonyms, pronunciation, spelling from Free Dictionary

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having incalculable monetary, intellectual, or spiritual worthSynonyms: pricelessOpposite worthlessSimilar valuable

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onerousadjective

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In·val′u·a·ble adjective

Valuable beyond estimation; inestimable; priceless; precious.

Webster’s Revised Unabridged Dictionary (1913), from GCIDE 0.54