A central region, especially one that is politically, economically, or militarily vital to a nation, region, or culture.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "heartland" in a sentence
"I think aides were saying that this issue is clearly important to everyone in this country, and so therefore they felt like no better place for the president to announce it than from what they call the heartland here in Crawford, Texas."
"It has bought an acre of land in what it calls the heartland of the planned Trump golf resort, and said the development cannot go ahead in its current form without access to it."
"She sometimes seemed short on specifics and long on folksiness, as she aimed to appeal to what she called the heartland of America."