Definition of hyper in US English:

hyper

adjective

informal
  • Hyperactive or unusually energetic.

    ‘eating sugar makes you hyper’
    • ‘Next week will see the gates of Unionism come crushing down, be prepared to see the siege mentality go into hyper speed.’
    • ‘I'm slowly losing the slight hyper buzz I had going on this afternoon, but that's okay.’
    • ‘Beth's hyper as it is and has a bit of a caffeine intolerance.’
    • ‘Maybe there's been so much rejection from past peers that she acts hyper to get attention.’
    • ‘A generation will grow up even more fickle than before, hyper consumers, hedonists.’
    • ‘The long car ride and Red Bulls we had pounded left him hyper and a little crazy.’
    • ‘Refreshingly frank and unaffected, he loves a chat and concedes that he's often hyper.’
    • ‘Whenever his friends or family were around he became extremely energetic and hyper.’
    • ‘They're not only super sexy, they also are totally hyper and so much fun onstage.’
    • ‘Now I'm hyper and freaked out, and at the same time too depressed to work.’
    • ‘My two girls, Romy, who's three and a half and Honor who's just one and half, were hyper with all the activity.’
    • ‘Naturally, Olive was hyper, the way the woman was talking she had the job and it was only a matter of signing a contract.’
    • ‘I hate going even without these barriers so I'm on hyper alert for anything that might lead me down that path.’
    • ‘You get a smiley, hyper, crazy kid who was just so out there it was a wonder where he got his energy from.’
    • ‘He waves away a hotel employee bearing refreshments: coffee makes him hyper.’
    • ‘I was still feeling exhausted from the last week, so had a strong coffee just before going on and felt a bit hyper for the first hour or so.’
    • ‘I had hoped the dogs would be less excited, but when have they ever been anything but hyper to meet guests?’
    • ‘Williams was so hyper it made Faulkner ‘look like a Zen Buddhist, even with his twitching’.’
    • ‘It gives me the right to be hyper and full of zest and energy, or slow and devoid of all unique thought.’
    • ‘They make us hyper and overexcited and, once faded, leave us grumpy or exhausted or or tearful or craving more.’
    mad, crazy, insane, out of one's mind, hysterical, beside oneself, frenzied, crazed, demented, maniacal, manic, frantic, wound up, worked up, raving, wild
    View synonyms

Origin

1940s: abbreviation of hyperactive.

Pronunciation

hyper

/ˈhīpər//ˈhaɪpər/