When we have a conversation, sometimes a silence drops. And it always has a meaning, even when nothing is said. We can skip words and complete sentences and still know what isnt said. So its not remarkable that there are alot of silences, and all with different meanings.
Every one knows that a conversation is more than a collection of words. The intonation, the speed of speaking and gestures made are a big part of our daily communcation as well. So if you compare this nonverbal communication with silences, they may not always be remarkable, or you dont notice them at all, but they are part of the conversation. Sometimes a silence can be a replacement for a whole sentence. Here is an example you might recognize: