To soar is to fly in a glider. A glider is defined as a flying craft design to use upward air currents (thermals) in the atmosphere to gain and maintain altitude.
FAQ version 1.04, list of books, audio-visual materials, patents, the OSTIV conference proceedings index, the Technical Soaring index (incomplete), serials, and flight test evaluation reports in any language. http://w3.gwis.com/~mks/book.htm