hyper If someone is hyper, they are very excited and energetic. INFORMAL adj usu v-link ADJ
(=hyperactive) I was incredibly hyper. I couldn't sleep.
Hyper- is used to form adjectives that describe someone as having a lot or too much of a particular quality. prefix
I hated my father. He was hyper-critical and mean..., He is one of those lean, hyper-fit people.
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"Collins Cobuild English Dictionary for Advanced Learners 4th edition published in 2003 © HarperCollins Publishers 1987, 1995, 2001, 2003 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995"