Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “hyper”


adjective     /ˈhaɪ.pər/ US  /-pɚ/ informal
too excited and energetic : I don't let him have sweet fizzy drinks because they tend to make him hyper. → See also hyperactiveBecoming too excited and easily upset
(Definition of hyper adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of hyper

More definitions for “hyper”

Definitions of “hyper” in other dictionaries

Word of the Day


a skilled and trained cook who works in a hotel or restaurant, especially the most important cook

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More