What is the meaning of the word "belt"?

Definitions:

a band to tie or buckle around the body usually at the waist noun
- My trousers don't stay up without a belt.
an elongated region where a specific condition or characteristic is found noun
- a belt of high pressure
to deliver a blow to verb
- The cat belted its toy with remarkable vigor.
to fasten with a belt verb
- I made sure to belt my trousers before leaving the bathroom.
to sing loudly and forcefully verb
- I belted the song during karaoke night.