1. having rotted or decomposed; in a state of decay
2. having deteriorated or fallen into ruin

Examples

• The decayed wood crumbled when I touched it.
• We found several decayed teeth during the dental exam.
• The decayed building was scheduled for demolition.
• Decayed leaves covered the forest floor.
• The old mansion had decayed over the decades.
• She removed the decayed fruit from the bowl.
• The decayed bridge was no longer safe to cross.