- tyranny [tir′ə nē]n.pl. tyrannies [ME tirannie < OFr < ML tyrannia < Gr]1. the office, authority, government, or jurisdiction of a tyrant, or absolute ruler2. oppressive and unjust government; despotism3. very cruel and unjust use of power or authority4. harshness; rigor; severity5. a tyrannical act
English World dictionary. V. Neufeldt. 2014.