What is Trunk ?
Trunk is (noun) 1. the thick stem of a tree Ivy was climbing up the trunk of the oak tree. 2. an elephant’s long nose 3. the main part of a person’s body 4. a large box for storing or sending clothes They sent a trunk of clothes in advance to the new house. 5. US a space at the back of a car, where you put luggage They stowed the boxes in the trunk. (NOTE: The British term is boot.)
source: Easier English, Student Dictionary Upper Intermediate Level