Definition of heartland
: a central area: such as
a
: a central land area (such as northern Eurasia) having strategic advantages
b
: the central geographical region of the U.S. in which mainstream or traditional values predominate
c
: a region where something (such as an industry or activity) most strongly thrives
the heartland of high technology
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Merriam-Webster unabridged
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Time Traveler for heartland
The first known use of heartland was in 1903
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