Pronunciation: (är"gyu-men-tā'shun),[key] —n. 1. the process of developing or presenting an argument; reasoning.
2. discussion; debate; disputation: The lengthy argumentation tired many listeners. 3. a discussion dealing with a controversial point.
4. the setting forth of reasons together with the conclusion drawn from them.
5. the premises and conclusion so set forth.
6. argument (def. 5).