Taxonomy is one of those words that most people never hear or use. Basically, a taxonomy is a way to group things together. For example, I might have a bunch of different types of animals. I can group them together according to various characteristics and then assign those groups names. This is something most people encounter in biology classes, and it is known as the Linnaean Taxonomy. In WordPress, a “taxonomy” is a grouping mechanism for some posts (or links or custom post types). The names for the different groupings in a taxonomy are called terms. Using groupings of animals as an example, we might call one group “birds”, and another group “fish”. “Fish” and “birds” are terms in our taxonomy. As an example from WordPress, a category or tag (see next section) is a term.