(1) "Person" includes a firm, partnership, or corporation;
(2) "Dealer" means a person engaged in the business of selling, exchanging, or acting as a broker of aircraft or who offers for sale two or more aircraft within a calendar year;
(3) "Aircraft" means any weight-carrying device or structure for navigation of the air, designed to be supported by the air, but which is heavier than air and is mechanically driven;
(4) "Secretary" means the secretary of the state department of transportation.