Princeton's WordNet(2.00 / 1 vote)Rate this definition: Wiktionary(0.00 / 0 votes)Rate this definition: Freebase(0.00 / 0 votes)Rate this definition: Ponderosa is a television series developed by Bonanza creator David Dortort for PAX-TV that ran for the 2001–2002 television season. Envisioned as a prequel to the long-running NBC series Bonanza, it had less gunfire, brawling and other traditional western elements than the original.