The term 'Upright Pole' can be broken down into two words, 'MAST' and 'POST'. A MAST is a tall vertical pole or structure used to support sails, rigging, flags, or other items. A POST is a vertical support, typically made of wood or metal, that is used to support a structure or object. Together, these two words form the term 'Upright Pole', which is a tall, vertical pole or structure used to support something.