Definitions of trunk:

• noun:   luggage consisting of a large strong case used when traveling or for storage
• noun:   the main stem of a tree; usually covered with bark; the bole is usually the part that is commercially useful for lumber
• noun:   a long flexible snout as of an elephant
• noun:   the body excluding the head and neck and limbs
• noun:   compartment in an automobile that carries luggage or shopping or tools

  Example: "He put his golf bag in the trunk"

• name:  A surname (very rare: popularity rank in the U.S.: #34522)