ultrabright

adjective
ul·​tra·​bright | \ ˌəl-trə-ˈbrīt How to pronounce ultrabright (audio) \

Definition of ultrabright

: extremely or extraordinarily bright an ultrabright light bulb ultrabright colors

First Known Use of ultrabright

1896, in the meaning defined above

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The first known use of ultrabright was in 1896

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