This document discusses semantics and pragmatics. It defines homonyms as words that share the same pronunciation and spelling but have different meanings. It distinguishes between four types of homonyms based on their syntactic behavior and spelling: 1) same syntactic category and spelling, 2) same category but different spelling, 3) different categories but same spelling, 4) different categories and spelling. The document then defines polysemy as multiple senses of the same word that are related, as opposed to homonyms which are unrelated senses. It provides examples distinguishing homonyms and polysemy in dictionary entries. Finally, it assigns an activity for students to find examples of homonyms and polysemy in the dictionary.