im ‧ pe ‧ ri ‧ ous /ɪmˈpɪəriəs $ -ˈpɪr-/ BrE AmE adjective
[ Date: 1500-1600 ; Language: Latin ; Origin: imperiosus , from imperium ; ⇨ ↑ imperial ]
giving orders and expecting to be obeyed, in a way that seems too proud:
She raised her hand in an imperious gesture.
—imperiously adverb
—imperiousness noun [uncountable]