Democracy definition is - government by the people; especially : rule of the majority. The word ‘democracy’ has its origins in the Greek language. It combines two shorter words: ‘demos’ meaning whole citizen living within a particular city-state and ‘kratos’ meaning power or rule. So we can say democracy in a country in which the people choose their government by voting for it.
Republic - A republic is a country where power is held by the people or the representatives that they elect.