Pleroma is a term derived from ancient Greek, meaning "fullness." In various philosophical and religious contexts, it refers to the totality of divine powers or the spiritual realm. In Gnosticism, it represents the fullness of the divine presence, contrasting with the material world. In modern usage, Pleroma is also associated with decentralized social media platforms that operate on the Mastodon protocol. These platforms allow users to create their own servers, promoting freedom of expression and community-driven content without centralized control.