Pronunciation: (härt'land", -lund), [key]
1. the part of a region considered essential to the viability and survival of the whole, esp. a central land area relatively invulnerable to attack and capable of economic and political self-sufficiency.
2. any central area, as of a state, nation, or continent: a vineyard in California's heartland.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.