Coherence or coherent can refer to: Coherence (cognitive science), a property of mental/cognitive states Coherence (linguistics), what makes a text semantically meaningful Coherence (physics), a property of waves Quantum coherence Coherence time (communications systems), duration when a communication channel can be assumed to be constant. Coherence (software), a component of Parallels Desktop for Mac, the Windows virtualization software Coherence (music theory), a synonym for strict Rothen… (More on Coherent)