Focus on the pronunciation of heartland
English definition of “heartland”
heartland noun [C]
/ˈhɑːtlænd/ (also heartlands [plural])
› an area where a particular industry is very important: heartland of sth Poland, the Czech Republic, and Slovakia have become Europe's new heartland of carmaking investment.agricultural/industrial/commercial heartland(s) At the center of India's industrial heartland, the hoped-for flood of jobs has not yet come.