This document provides definitions for over 50 key terms used in critical discourse analysis (CDA). It begins with definitions of fundamental CDA concepts like approach, bias, control, critical, ideology, and power. It then defines specific CDA models and frameworks, like Fairclough's socio-cultural approach and van Dijk's socio-cognitive approach. Finally, it outlines linguistic concepts analyzed in CDA, such as transitivity, modality, and lexical choice. The document serves as a comprehensive glossary of technical terms for researchers applying CDA to analyze language, power, and social issues.