1
a
: in an impassioned manner : angrily, hotly
an alarm is raised and a number of Moors on horseback furiously pursue them—Bernard DeVoto
b
: in a turbulent manner : wildly
the wind ran furiously, tearing leaves off trees, carrying great volumes of dust before it—Sherwood Anderson
2
: in a lively manner : energetically
she would heave her huge body onto the saddle and go pedaling furiously up the narrow street—Arnold Hill
3
: in an intensive manner or degree : extremely
decorated with furiously modern murals—Frederic Morton a furiously colorful futurist study—S. E. Hyman
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Merriam-Webster unabridged