"Rosebud" is a famous term from the classic film Citizen Kane, directed by Orson Welles. In the movie, it is the last word spoken by the main character, Charles Foster Kane, as he dies. The term serves as a symbol of Kane's lost childhood and unfulfilled desires, prompting a quest to uncover its meaning. The significance of "Rosebud" lies in its representation of nostalgia and the impact of childhood experiences on adult life. Throughout the film, various characters attempt to understand Kane's life, with "Rosebud" ultimately revealing the emotional core of his character and the complexities of his journey.