1. the quality of having a sharp, sour taste
2. the quality of being sharp or cutting in speech or manner

Examples

• The tartness of the green apples made her pucker her lips.
• She added sugar to balance the tartness of the cranberries.
• The lemon’s natural tartness enhanced the flavor of the pie.
• His tartness in responding to questions surprised everyone.
• The critic’s tartness was evident in her scathing review.
• Despite her tartness, she was respected for her honesty.
• The tartness of his wit made him popular at dinner parties.