Coherence means holding together in a way that makes sense. When your ideas have coherence, they connect logically so others can follow your thinking. A story with coherence doesn't jump randomly between events: each part leads naturally to the next, and the ending fits with everything that came before.

Think about explaining how you solved a math problem. If you write down your steps in order and each one follows from the previous step, your work has coherence. But if you skip steps or write them out of order, even a correct answer might confuse your teacher because your explanation lacks coherence.

The word applies beyond writing and speaking. A basketball team plays with coherence when players work together smoothly, each person's actions making sense with what their teammates are doing. Scientists value coherence in theories: good scientific explanations need internal coherence, meaning all the parts fit together without contradicting each other.

The opposite of coherence is confusion or chaos. When something is incoherent, it doesn't make sense or hold together properly. Someone who just woke up might speak incoherently, with their thoughts jumbled and disconnected. A coherent person or argument, by contrast, is clear, logical, and easy to understand because all the pieces fit together into a sensible whole.