Dictionary Corner is a segment often featured in word-based games and quizzes, where participants can explore and define words. It typically involves a dictionary or a similar reference tool to help players understand the meanings, spellings, and usage of various terms. In shows like Countdown, the segment allows contestants to seek assistance from a lexicographer or language expert. This expert provides insights into the words chosen during the game, enhancing the players' vocabulary and understanding of language while also entertaining the audience with interesting word facts.