public domain in law, legal availability for public use, free of charge, of materials, processes, devices, skills, and plans that are not protected by copyright or patent, including those on which copyright or patent has lapsed. source: The Columbia Encyclopedia, Sixth Edition. Copyright (c) 2001-05 Columbia University Press. Thomas Kinkade is America's most collected living artist, a painter-communicator whose tranquil light-infused art brings hope and joy to millions. His work affirms the basic values of family, faith in God, and the harmonious beauty of nature.