A wide area of flat land without trees in Canada and the northern US. (Cambridge Dictionary)
A prairie is a large area of flat, grassy land in North America. Prairies have very few trees. (Collins Dictionary)
Land in or predominantly in grass. (Merriam – Webster)
An extensive, level or slightly undulating, mostly treeless tract of land in the Mississippi valley, characterised by a highly fertile soil and originally covered with coarse grasses, and merging into drier plateaus in the west. (Dictionary.com)
A large open area of grassland, especially in North America.
Examples
What makes a mountain, hill or prairie a ‘sacred’ place for Native Americans?
https://theconversation.com/what-makes-a-mountain-hill-or-prairie-a-sacred-place-for-native-americans-73169
Warmer Prairie winters: sounds good, but what does it really mean?
http://prairieclimatecentre.ca/2016/07/warmer-prairie-winters-sounds-good-but-what-does-it-really-mean/
7 things you didn’t know about prairie dogs.
https://www.mnn.com/earth-matters/animals/stories/7-things-you-didnt-know-about-prairie-dogs