1. (a.) Commanding; domineering; overbearing\; ascendant; imperial; lordly; majestic.

2. (a.) Haughty; arrogant; overbearing; as, an imperious tyrant; an imperious manner.

3. (a.) Imperative; urgent; compelling.

U absolute absolutist absolutistic acute arbitrary aristocratic arrogant authoritarian authoritative autocratic binding bossy clamorous coactive compelling compulsatory compulsive compulsory constraining critical crucial crying de rigueur despotic dictatorial domineering driving dynastic elitist exigent feudal grinding heavy-handed high and mighty high-handed high-pressure high-priority hubristic imperative imperatorial imperatorious imperial insistent instant irresistible kinglike kingly lordly magisterial magistral majestic mandatory masterful monarchal monarchial monarchic monocratic must necessary obligatory oppressive overbearing overruling peremptory pivotal pressing princelike princely purple queenlike queenly regal repressive required restraining royal severe sovereign strict stringent suppressive tyrannical tyrannous urgent