Definitions:

1. independent existence with some characteristics of life noun
   • Sometimes it seems like my computer has a life of its own.
2. Refers to something developing an independent existence or seeming to move or function by itself without direct human control. NOUN
   • Once the rumor started, it seemed to take on a life of its own.
3. The state of something that exists and thrives outside and beyond the control of the point of origin. NOUN
   • An urban legend can have a life of its own, changing every time it is retold.
   • The ball seemed to have acquired a life of its own.

Synonyms:

• Became alive
• Came to life
• Own accord
• Own volition