1. the state of being covered with rust or affected by rust
2. the condition of having lost skill or ability through lack of practice
Usage: figurative

Examples

• The rustiness of the old car made it difficult to sell.
• She noticed the rustiness on the garden tools after leaving them outside all winter.
• His rustiness at the piano was obvious after not playing for two years.
• The athlete’s rustiness showed in her first game back from injury.
• The rustiness of the metal fence required immediate attention.
• After months away from coding, his rustiness with the programming language was evident.