1. the quality of being unclear, illogical, or difficult to understand
2. lack of logical connection between ideas or parts

Examples

• The incoherence of his argument made it impossible to follow.
• Her speech was marked by incoherence after the accident.
• The novel’s plot suffered from complete incoherence.
• The committee’s report showed disturbing incoherence in its recommendations.
• His fever caused temporary incoherence in his thinking.
• The incoherence of the instructions frustrated the students.