1. the quality or state of being acid; sourness or sharpness of taste
2. harshness or bitterness in speech, manner, or temper

Examples

• The acidness of the lemon made her pucker her lips.
• She couldn’t tolerate the acidness of the unripe fruit.
• The wine’s acidness balanced its sweetness perfectly.
• His acidness in conversation made others uncomfortable.
• The acidness of her remarks revealed her true feelings.
• The vinegar’s acidness was too strong for the salad dressing.