un ‧ der ‧ way /ˌʌndəˈweɪ $ -ər-/ BrE AmE adjective [not before noun]
1 . happening now:
The project is already well underway.
Your peace will be shattered when the tourist season gets underway (=starts) .
2 . something such as a boat or train that is underway is moving
⇨ be under way at ↑ way 1 (10)