The meaning of HYPER is high-strung, excitable; also : highly excited. How to use hyper in a sentence.

having a lot or too much of the stated quality: hypercritical hyperintelligent (Definition of hyper from the Cambridge Academic Content Dictionary © Cambridge University Press)

Britannica Dictionary definition of HYPER [more hyper; most hyper] informal : very excited, nervous, or active a hyper [= hyperactive] kid

1. very excitable or nervous; overexcited; keyed up. 2. hyperactive. 3. obsessively concerned; fanatical; rabid.

Someone who's hyper is overly excited or energetic. If coffee and tea make you feel a little hyper, you might try switching to decaf!

hyper– Scientific A prefix that means “excessive” or “excessively,” especially in medical terms like hypertension and hyperthyroidism.

Definition of hyper adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

hy•per1 /ˈhaɪpɚ/ adj. [Informal.] overexcited; keyed up: acting hyper after staying inside for five days. overly concerned about something: hyper about proper pronunciation. hyper-, prefix. hyper- is …

Hyper- is used to form adjectives that describe someone as having a lot or too much of a particular quality. I hated my father. He was hyper-critical and mean. He is one of those lean, hyper-fit people. …

From Longman Dictionary of Contemporary English hy‧per /ˈhaɪpə $ -ər/ adjective informal extremely excited or nervous about something No, don’t give Luke any candy – it’ll make him hyper.