Noah Webster's Dictionary (a.) Unjustly severe in government; imperious; despotic; cruel; arbitrary; as, a tyrannical leader; tyrannical government.

Multi-Version Concordance Tyrannical (2 Occurrences) Proverbs 28:16 A tyrannical ruler lacks judgment. One who hates ill-gotten gain will have long days. (WEB NIV) Zephaniah 3:1 Woe to her who is rebellious and polluted, the oppressing city! (See NAS)