heartland

[ hahrt-land, -luh nd ]
/ ˈhɑrtˌlænd, -lənd /

noun

the part of a region considered essential to the viability and survival of the whole, especially a central land area relatively invulnerable to attack and capable of economic and political self-sufficiency.
any central area, as of a state, nation, or continent: a vineyard in California's heartland.

Origin of heartland

First recorded in 1900–05; heart + land
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for heartland

British Dictionary definitions for heartland

heartland

/ (ˈhɑːtˌlænd) /

noun

the central region of a country or continent
the core or most vital areathe industrial heartland of England
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012