1. the quality or state of being morally correct or just
2. the quality or state of being accurate or true
3. the quality or state of being appropriate or suitable

Examples

• She questioned the rightness of the court’s decision.
• The rightness of his answer was confirmed by the teacher.
• There was a sense of rightness about their choice to help.
• He doubted the rightness of lying to protect someone’s feelings.
• The rightness of the solution became clear after testing.
• She felt the rightness of her decision deep in her heart.
• The rightness of his actions was never questioned by his peers.