1. the process of being gradually destroyed or worn away by chemical action, especially oxidation
Usage: plural form of corrosion; commonly used in chemistry, materials science, and engineering contexts
2. damage or material loss caused by corrosive processes
Usage: plural form; refers to multiple instances or areas of corrosive damage

Examples

• The corrosions on the metal pipe indicated years of exposure to moisture.
• Salt water causes severe corrosions to ship hulls over time.
• Engineers studied the corrosions in the bridge's steel framework.
• Multiple corrosions were found in the battery terminals.
• The corrosions spread rapidly once the protective coating was damaged.
• Rust and other corrosions weakened the old machinery.