Pronunciation: (kō-hēr'),[key] —v.i.,-hered, -her•ing. 1. to stick together; be united; hold fast, as parts of the same mass: The particles of wet flour cohered to form a paste. 2. Physics.(of two or more similar substances) to be united within a body by the action of molecular forces.
3. to be naturally or logically connected: Without sound reasoning no argument will cohere. 4. to agree; be congruous: Her account of the incident cohered with his.