1. the quality or state of being irregular; lack of regularity or uniformity
2. something that is irregular or does not conform to rules or standards
3. a violation of rules or proper conduct
Usage: formal

Examples

• The irregularity of his heartbeat concerned the doctor.
• There was an irregularity in the voting process that needed investigation.
• The surface showed irregularities that made it difficult to paint smoothly.
• Financial irregularities were discovered during the audit.
• The irregularity of the bus schedule made commuting frustrating.
• She noticed an irregularity in the pattern of the fabric.
• Any irregularities in the application will result in rejection.