ul·​tra·​en·​er·​get·​ic ˌəl-trə-ˌe-nər-ˈje-tik How to pronounce ultraenergetic (audio)
: having or showing a great deal of energy : extremely or extraordinarily energetic
ultraenergetic college students
ultraenergetic cosmic rays

Word History

First Known Use

1848, in the meaning defined above

Time Traveler
The first known use of ultraenergetic was in 1848

Dictionary Entries Near ultraenergetic

Cite this Entry

“Ultraenergetic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ultraenergetic. Accessed 28 Feb. 2024.

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