B1
an organized journey, especially a long one for a particular purpose
Dictionary examples:
The expedition to find my glasses ended when I realized they were on my head. (0.0)
Our expedition to find the world's best pizza ended at my grandmother's kitchen. (0.0)
The expedition to locate my missing sock lasted three days and two nights. (0.0)
Shackleton led several expeditions in the Antarctic. (27.1)