Definition of aerial
                                                                                                    
                                                                    
                                                                                                                 characterized by 
lightness and insubstantiality; as 
impalpable or 
intangible as air; "figures 
light and aeriform 
come unlooked for and 
melt away"- Thomas Carlyle; "aerial fancies"; "an airy apparition"; "physical 
rather than ethereal forms"