Pronunciation: (kun-sis'tun-sē),[key] —n., —pl.-cies. 1. a degree of density, firmness, viscosity, etc.: The liquid has the consistency of cream. 2. steadfast adherence to the same principles, course, form, etc.: There is consistency in his pattern of behavior. 3. agreement, harmony, or compatibility, esp. correspondence or uniformity among the parts of a complex thing: consistency of colors throughout the house. 4. the condition of cohering or holding together and retaining form; solidity or firmness. Also,con•sist'ence.