Chapter 1

　　1. The three definitions agree that lexicology studies words. Yet, they have different focuses. Definition 1 focuses on the meaning and uses of words, while definition 2 on the overall structure and history. Definition 3 regards lexicology as a branch of linguistics and focuses on the semantic structure of the lexicon. It is interesting to note that the three definitions use different names for the object of study. For Definition 1, it is words, for Definition 2 the vocabulary of a language, and for Definition 3 the lexicon.