Definition of immeasurable adjective from the Oxford Advanced American Dictionary

 

immeasurable

 adjective
adjective
NAmE//ɪˈmɛʒərəbl//
 
(formal)
 
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too large, great, etc. to be measured to cause immeasurable harm Her contribution was of immeasurable importance.
immeasurably
 
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NAmE//ɪˈmɛʒərəbli//
 
adverb Housing standards improved immeasurably after the war. Stress has an immeasurably more serious effect on our lives than we realize.
See the Oxford Advanced Learner's Dictionary entry: immeasurable