1. a chemical substance that has a pH less than 7 and can react with metals and bases
Usage: chemistry
2. a sour-tasting liquid or substance

1. having a sharp, sour taste
2. containing acid; having the properties of an acid
Usage: chemistry
3. harsh or bitter in manner, speech, or temper

Examples

• The scientist carefully handled the sulfuric acid in the laboratory.
• Lemon juice contains citric acid, which gives it a sour taste.
• The acid rain damaged the marble statue over time.
• She made an acid comment about his poor performance.
• The soil was too acid for growing most vegetables.
• Stomach acid helps digest food.
• His acid wit made him unpopular at parties.