(ˈ)im|pirēəs, əmˈp-, -pēr- adjective
Etymology: Latin imperiosus, from imperium command, supreme authority, empire + -osus -ous — more at empire
1.
a. obsolete : imperial 1a, 1b
b. : commanding , dominant , lordly
sweeps through her social duties with imperious kindness — Margaret Landon
c. obsolete : majestic , stately
2. : arrogant , overbearing , domineering
3. : imperative , urgent , compelling
at the mercy of the most imperious of instincts, of passions, and of intoxications — Arthur Symons
so imperious became the commercial demand — Lewis Mumford
Synonyms: see masterful