1. the quality of being inconsistent; lack of agreement or harmony between parts
2. an instance of being inconsistent; a contradictory or incompatible element

Examples

• The inconsistency in his story made the jury doubt his testimony.
• There's an inconsistency between what she says and what she does.
• The report contained several inconsistencies that needed to be addressed.
• His inconsistency as a player frustrated the coach.
• The inconsistency of the data suggests measurement errors.
• She pointed out the inconsistency in the company's policies.
• The inconsistency between the two accounts was troubling.