the quality of being vicarious (= experienced through the activities of other people, rather than by doing something yourself): We watch the movie with a feeling of intense vicariousness.

What is the noun form of vicarious?

vicariousness. The quality of being vicarious.

What's the word for living through someone?

If you're living vicariously, stop it. Get out and live life for yourself. Vicariously means that you're experiencing something indirectly, like when your friend's adventure feels like your own. Vicariously is the adverb form of the word vicarious, which also involves experiencing something through another person.