| 摘要 | 第1-5页 |
| Abstract | 第5-6页 |
| Acknowledgements | 第6-11页 |
| Chapter One Introduction | 第11-16页 |
| ·Rationale for the Research | 第11-13页 |
| ·Objectives of the Research | 第13-14页 |
| ·Layout of the Thesis | 第14-16页 |
| Chapter Two Literature Review | 第16-26页 |
| ·Study of Polysemy before Cognitive Approach | 第16-20页 |
| ·Naming Theory | 第16页 |
| ·Componential Analysis Approach | 第16-18页 |
| ·Historical Comparative Linguistics | 第18-19页 |
| ·Semantic Field Theory | 第19页 |
| ·Limitations of the Study of Polysemy before Cognitive Approach | 第19-20页 |
| ·Cognitive Study of Polysemy | 第20-23页 |
| ·A Brief Survey of Cognitive Linguistics | 第21页 |
| ·Related Studies in English | 第21-23页 |
| ·Study of Polysemous Animal Words | 第23-24页 |
| ·Summary | 第24-26页 |
| Chapter Three Theoretical Framework | 第26-38页 |
| ·Categories in Mind and Language | 第26-27页 |
| ·Category Shift in Lexicon | 第27-32页 |
| ·Conceptual Metaphor | 第28-29页 |
| ·Conceptual Metonymy | 第29-32页 |
| ·Category Shift in Grammar | 第32-36页 |
| ·Grammatical Metaphor | 第33-34页 |
| ·Grammatical Metonymy | 第34-35页 |
| ·Grammaticalization | 第35-36页 |
| ·Summary | 第36-38页 |
| Chapter Four Methodology | 第38-45页 |
| ·Explanation of the Selection of English Animal Lexemes from MEDAL | 第38-40页 |
| ·Instruments Used in the Study | 第40-41页 |
| ·Data Collection | 第41-43页 |
| ·The Exclusion of Homonyms | 第41-42页 |
| ·The Exclusion of Non-animal Lexemes | 第42-43页 |
| ·The Exclusion of Derivational Lexemes | 第43页 |
| ·Plan of the Research | 第43-45页 |
| Chapter Five Results and Discussion | 第45-60页 |
| ·Study of English Polysemous Animal Lexemes from MEDAL in which Conversion Is Not Involved | 第45-49页 |
| ·Conceptual Metonymy as a Means of Semantic Extension | 第45-47页 |
| ·Conceptual Metaphor as A Means of Semantic Extension | 第47-49页 |
| ·Study of Polysemous Animal Lexemes from MEDAL in which Conversion Is involved (Grammatical Metonymy as A Means of Semantic Extension) | 第49-51页 |
| ·A Case Study of Fish | 第51-55页 |
| ·New Types of Metonymy | 第55-57页 |
| ·Polysemy and Word Frequency | 第57-59页 |
| ·Summary | 第59-60页 |
| Chapter Six Implications for English Lexicography | 第60-72页 |
| ·The Organization of Definitional Information | 第61-66页 |
| ·Definitional Style | 第66-69页 |
| ·Sense Order | 第69-70页 |
| ·Summary | 第70-72页 |
| Chapter Seven Conclusion | 第72-75页 |
| ·Major Findings and Implications of the Research | 第72-73页 |
| ·Limitations of the Research and Suggestions for Further Study | 第73-75页 |
| References | 第75-84页 |
| Appendix1: Entries of Polysemous Animal Lexemes from MEDAL | 第84-98页 |
| Appendix2: Animal Lexemes and Their Frequency | 第98-102页 |
