Chapter 5 Meaning                             
     The subject concerning the study of meaning is called SEMANTICS.
More specifically, semantics is the study of the meaning of linguistic units, words and sentences in particular.  研究意义学科叫做语义学。更详细地说，语义学是研究语言单位意义，尤其是词和句子意义学科。
Meaning has been studied for thousands of years by philosophers, logicians and linguists. E.g. Plato & Lao Zi.