What is the meaning of Tyranni?

tyrant (usurper in Ancient Greece)

tyrant, despot (ruler who governs unjustly, cruelly, or harshly)

tyrant (person who abuses the power of position or office to treat others unjustly, cruelly, or harshly)

tyrant flycatcher (passerine bird in the family Tyrannidae)

inflection of tyrannus:

1. genitive singular
2. nominative/vocative plural

genitive singular

nominative/vocative plural

tyranny

tyranny

tyranny (cruel and oppressive exercise of power)

Source: wiktionary.org