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Democracy is people's rule. Democracy means for the people,of the people and by the people.

Dictatorship means a country governed by a dictator. People who spoke against the party or the ruler will be prisoned or tortured .
the difference between democracy and dictatorship is :

democracy :
1. it is a political party in which sovereign vest with people.
2. free and fair elections are need for democracy.
3. public opinion has a important place in democracy.

dictatorship :
1. it is a political system in which sovereign vests in one single persons hand.
2. it does not need elections.
3. public opinion is not taken under consideration.  

hope so my answer is useful.............^_^  !!!