Dictionaries play a crucial role within society, cherished as cultural treasures and repositories of knowledge. Yet, there exists a prevalent misconception that dictionaries are infallible authorities, often overlooking their inherent ideological underpinnings. It is imperative to acknowledge that every dictionary carries its own ideology, discernible through its overarching structure, the selection of entries, methods of definition, and the illustrative examples of use. Within the realm of translation pedagogy, proficiency in dictionary utilization is paramount for students learning translation. Invariably, students find it challenging to abstain entirely from dictionary references, thus embracing dictionaries as indispensable tools for enhancing their linguistic competence. Consequently, it becomes crucial for translators to be astute in recognizing the ideological nuances embedded within dictionary entries. These sources, presumed to be neutral, can inadvertently perpetuate idealized societal values and linguistic norms, reflecting the conscious or unconscious ideological choices made by lexicographers. In this chapter, we illustrate this phenomenon by analyzing dictionary discourse on gender, sex, and sexuality.