Dictionary

hy•per

Pronunciation: (hī'pur), [key] Informal.

—adj.
1. overexcited; overstimulated; keyed up.
2. seriously or obsessively concerned; fanatical; rabid: She's hyper about noise pollution.
3. hyperactive.

—n.
a person who is hyper.

hy•per

Pronunciation: (hī'pur), [key]
—n. Informal.
a person who promotes or publicizes events, people, etc., esp. one who uses flamboyant or questionable methods; promoter; publicist.

hyper-

a prefix appearing in loanwords from Greek, where it meant “over,” usually implying excess or exaggeration (hyperbole); on this model used, especially as opposed to hypo-, in the formation of compound words (hyperthyroid). Cf. super-.

hyped-up

hyperacidity