imperial

adjective

1 the symbol figured on the imperial banners:

royal, regal, monarchal, monarchial, monarchical, sovereign, kingly, queenly, princely, majestic;

rare imperatorial.

2 her imperial bearing:

majestic, grand, dignified, proud, stately, noble, aristocratic, regal;

magnificent, great, distinguished, imposing, impressive, august, lofty.

3 our customers thought we were imperial and uninterested in them:

imperious, high-handed, commanding, peremptory, dictatorial, domineering, bossy, arrogant, overweening, overbearing, authoritarian, tyrannical, authoritative, lordly, officious.

imperial Oxford Dictionary of English