1. the process of thinking about something in a logical way in order to form a conclusion or judgment
2. the reasons or logical basis for a belief or action

Examples

• Her reasoning was clear and easy to follow.
• The detective used careful reasoning to solve the case.
• I don’t understand your reasoning behind that decision.
• Mathematical reasoning requires practice and patience.
• The court questioned the reasoning in the lower court’s ruling.
• His reasoning was flawed because he ignored important evidence.
• Scientific reasoning involves forming and testing hypotheses.