IPA: /kəʊˈhɪərənsi/
KK: /koʊˈhɪrənsi/
The quality of being logical and consistent, making it easy to understand and follow.
The coherency of her argument made it very persuasive.
Coherency is formed from "co-" (meaning together) and "haerere" (meaning to stick or cling). The word describes the quality of being logically connected or sticking together in a coherent manner.
Think of things that 'stick together' ('haerere') in a logical way, which helps you remember that 'coherency' means the quality of being logically connected.