Definitions:

1. In computing, is a background process that runs continuosly on a computer system to perform specific functions or tasks without direct user interaction, and essential for managing system operations and services. NOUN
   • The email system relies on a daemon to manage the sending and receiving of messages in the background.
2. In mythology, refers to a supernatural being that can be either benevolent or malevolent. NOUN
   • The ancient philosophers believed that each person had a personal daemon guiding their actions.

Synonyms:

• automated process
• background process
• Demon
• lesser deity
• service
• Spirit
• supernatural being
• system task