1. nv precipitation in the form of small balls or lumps usually consisting of concentric layers of clear ice and compact snow
2. vn enthusiastic greeting
3. v be native of “She hails from Kalamazoo”
4. v call for “hail a cab”

Hail is when chunks of ice fall from the sky. Also, to hail someone is to greet them or say good things about them. Or it can be a way to tell people of your homeland, as in. “I hail from the Moon.”