invaluable

UK: /ɪnˈvæljuəb^əl/ US: /ɪnˈvæljuəbəl/ ,(in val′yo̅o̅ ə bəl)

WordReference Random House Learner's Dictionary of American English © 2026

in•val•u•a•ble /ɪnˈvælyuəbəl/   adj. 

1. beyond a value that can be determined or calculated;
   of great worth;
   priceless:
   Your assistance was invaluable.

in•val•u•a•bly, adv. 

WordReference Random House Unabridged Dictionary of American English © 2026

in•val•u•a•ble  (in val′yo̅o̅ ə bəl), adj. 

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

• in-³ + valuable, in obsolete sense "capable of valuation'' 1570–80

in•val′u•a•ble•ness, n. 
in•val′u•a•bly, adv. 
Synonyms

precious.

Antonyms

worthless.

Collins Concise English Dictionary © HarperCollins Publishers::

invaluable / ɪnˈvæljʊəb^əl/ adjective

1. having great value that is impossible to calculate; priceless

inˈvaluableness noun

inˈvaluably adverb