/ ˈfrenzi; NAmE / noun
[ C , usually sing. , U ] ( pl. -ies ) frenzy (of sth) a state of great activity and strong emotion that is often violent or frightening and not under control :
in a frenzy of activity / excitement / violence
The speaker worked the crowd up into a frenzy .
an outbreak of patriotic frenzy
a killing frenzy
—see also feeding frenzy
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WORD ORIGIN
Middle English : from Old French frenesie , from medieval Latin phrenesia , from Latin phrenesis , from Greek phrēn mind.