1.

A booth is small structure furnished with a payphone and designed for a telephone user's convenience. When walking on the sidewalk, we can often see the outdoor booth every corner. People might use it while having no access of cell phone.

2.

A place between public and private waiting to be defined.

3 (txt).
booth: Call one of your friends or family using the pay phone. Tell him(or her) where you are and what you are doing.

4.