coherence

1. the situation in which all the parts of something fit together well
   • The points you make are fine, but the whole essay lacks coherence.
   • He managed to impose a new coherence on the machinery of the state.
   • Your essay lacks internal coherence.
2. when something such as a piece of writing is easy to understand because its parts are connected in a clear and reasonable way
   • An overall theme will help to give your essay coherence.
   • He had a coherence of outlook and thought.