"Ds" can refer to various concepts, but one common meaning is the letter "D" in the English alphabet. It is the fourth letter and is often used to represent a sound made by the vocal cords. In grading systems, a "D" typically indicates below-average performance, often seen as a passing mark in schools. In another context, "Ds" can refer to the term "Dungeons," often associated with tabletop role-playing games like Dungeons & Dragons. In these games, players create characters and embark on adventures in imaginary worlds, guided by a Dungeon Master who narrates the story and controls the game environment.