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HYPHEN
WORDNET DICTIONARY
OXFORD DICTIONARY
THESAURUS
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WORDNET DICTIONARY

Adjective dictatorial has 3 senses

• dictatorial(a = adj.pert) Array - of or characteristic of a dictator; "dictatorial powers"
Derived form noun dictator₂

• dictatorial(s = adj.all) authoritarian, overbearing - expecting unquestioning obedience; "the timid child of authoritarian parents"; "insufferably overbearing behavior toward the waiter"
• dictatorial(s = adj.all) authoritarian, autocratic, despotic, tyrannic, tyrannical - characteristic of an absolute ruler or absolute rule; having absolute sovereignty; "an authoritarian regime"; "autocratic government"; "despotic rulers"; "a dictatorial rule that lasted for the duration of the war"; "a tyrannical government"
Derived form noun dictator₂

OXFORD DICTIONARY

THESAURUS

dictatorial

U, absolute, absolutist, absolutistic, all-powerful, arbitrary, aristocratic, arrogant, authoritarian, authoritative, autocratic, autonomous, bossy, bureaucratic, civic, civil, constitutional, democratic, despotic, domineering, elitist, fascist, federal, federalist, federalistic, feudal, governmental, grinding, gubernatorial, heteronomous, high and mighty, high-handed, hubristic, imperative, imperial, imperious, lordly, magisterial, magistral, masterful, matriarchal, matriarchic, monarchal, monarchial, monarchic, monocratic, official, oligarchal, oligarchic, omnipotent, oppressive, overbearing, overruling, parliamentarian, parliamentary, patriarchal, patriarchic, peremptory, pluralistic, political, repressive, republican, self-governing, severe, strict, suppressive, theocratic, totalitarian, tyrannical, tyrannous, unlimited

ROGET THESAURUS

dictatorial

Insolence

N insolence, haughtiness, arrogance, airs, overbearance, domineering, tyranny, impertinence, sauciness, flippancy, dicacity, petulance, procacity, bluster, swagger, swaggering, bounce, terrorism, assumption, presumption, beggar on horseback, usurpation, impudence, assurance, audacity, hardihood, front, face, brass, shamelessness, effrontery, hardened front, face of brass, assumption of infallibility, saucebox, insolent, haughty, arrogant, imperious, magisterial, dictatorial, arbitrary, high-handed, high and mighty, contumelious, supercilious, overbearing, intolerant, domineering, overweening, high-flown, flippant, pert, fresh, cavalier, saucy, forward, impertinent, malapert, precocious, assuming, would-be, bumptious, bluff, brazen, shameless, aweless, unblushlng, unabashed, brazen, boldfaced-, barefaced-, brazen-faced, dead to shame, lost to shame, impudent, audacious, presumptuous, free and easy, devil-may-care, rollicking, jaunty, janty, roistering, blustering, hectoring, swaggering, vaporing, thrasonic, fire eating, full of sound and fury, with a high hand, ex cathedra, one's bark being worse than his bite, beggars mounted run their horse to death, quid times? Caesarem vehis, wagahai wa (expressing superiority).

For further exploring for "dictatorial" in Webster Dictionary Online