Definitions:

1. A plot device in storytelling, particularly in movies, literature, and television. NOUN
   • Many sci-fi films use a mysterious artifact as a McGuffin to propel the characters on a grand adventure.
2. An object, device, or event that serves as a plot deive to trigger or motivate the progression of the storyline, typically something that the main characters are seeking or trying to protect. NOUN
   • The mysterious box served as the elusive McGuffin in the adventure film, its tru contents remaining a secret.
3. An object, goal, or piece of information that drives the plot forward, but its actual nature or importance may be irrelevant to the audience. NOUN
   • The stolen jewel in the heist movie turned out to be a classic McGuffin, as the real drama was about betrayal among thieves.

Synonyms:

• driving force of the story
• MacGuffin
• plot device
• red herring