The following words, terms and phrases, when used in this chapter, shall have the meanings ascribed to them in this section, except where the context clearly indicates a different meaning:
Any material, including lawn trimmings, trees, shrubs, brush, boxes, paper, straw, leaves, sawdust, tire, plastics, solvents, flammable liquids, and all rubbish and refuse that will ignite through contact with flames of ordinary temperatures.
The burning of combustible waste material which is kindled and maintained in whole or in part in the open air.