Definition of tyrannous in US English:

tyrannous

adjective

  • 1(of a government or ruler) exercising power in a cruel or arbitrary way.

    ‘a despotic and tyrannous empire’
    ‘they would welcome liberation from their tyrannous oppressor’
    1. 1.1 Characteristic of tyranny; oppressive and controlling.
      ‘a tyrannous disregard for the welfare of the workers’

Pronunciation

tyrannous

/ˈtɪrənəs//ˈtirənəs/