1. the quality or state of being mentally sound and rational
2. the quality of being reasonable and sensible

Examples

• The doctor questioned the saneness of his decision to climb the mountain alone.
• Her saneness in handling the crisis impressed everyone.
• The committee valued his saneness and clear thinking during debates.
• The saneness of the proposal made it easy to approve.
• She maintained her saneness despite the stressful situation.
• The judge’s saneness was evident in his fair ruling.