Taxonomy is the classification science.
Terminology is concept explanation science. It deals both for human and computer. In human field, dictionary is the good example. Every word in dictionary is described its meaning, that is definition, If editor want to describe pricisely, it will need long explanation. We learn most of words in life, or in sentence. Many examples form adequat concept for the term. That is, a concept of term is difficult to define and modern dictionaries have more example sentences.
In computer science, example based learning is called neural network. It modificate relation strength according to examples and come to calculate properly.
On the other hand, definition based model is called ontology.