Definition of imperious
1a
: marked by arrogant assurance : domineering
b
: befitting or characteristic of one of eminent rank or attainments : commanding, dominant
an imperious manner
2
: intensely compelling : urgent
the imperious problems of the new age— J. F. Kennedy
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Merriam-Webster unabridged
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Time Traveler for imperious
The first known use of imperious was in 1529
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