a treeless grassy plain
"The vast prairie stretched endlessly under the hot sun, offering a sea of green where no trees dared to grow."
An extensive area of relatively flat grassland with few, if any, trees, especially in North America.
"The vast prairie stretched endlessly across the American Midwest, covered only in golden grass and dotted with a single lone oak tree."
In plain English: A prairie is a vast area of open grassland with few trees, typically found in North America.
"The farmers planted corn across the vast prairie in west Texas."
Usage: Use "prairie" to describe vast, treeless grasslands found primarily across the central United States and Canada. Do not confuse this specific geographic term with general open fields or savannas that contain scattered trees.
Alternative form of Prairies
The word prairie was borrowed directly from French, where it originally referred to a large open grassland. It entered English with the same meaning, describing vast stretches of flat land covered in grass.