passionproject

noun
UK /ˈpæʃ.ən ˈprɒdʒ.ekt/
US /ˈpæʃ.ən ˈprɑː.dʒekt/

A passion project is something you work on because you love it, not because you have to.

Her little comic book about a flying cat is her passion project.


OTHER MEANINGS

2. A piece of work someone does for fun in their free time.

Building the treehouse was a passion project he did on weekends.

3. A creative idea someone cares about very much and keeps working on.

The school garden started as a passion project for the science club.

4. Something you make or do mainly because it makes you happy.

His homemade robot is a passion project, not a school assignment.