autocracy
Concise Oxford English Dictionary © 2008 Oxford University Press:
autocracy /ɔːˈtɒkrəsi/
▶noun (pl. autocracies) a system of government by one person with absolute power.
■ a country, state, or society governed in this way.
– origin C17: from Gk autokrateia, from autokratēs, from autos ‘self’ + kratos ‘power’.
'autocracy' also found in these Oxford entries:

