ˈ ̷ ̷ˌ ̷ ̷ noun
1.
a. : land that lacks significant variation in elevation
the farm includes a valuable stretch of flatland along the river
b. : a region in which the land is predominantly flat — usually used in plural
coastal flatlands
2. : a hypothetical two-dimensional world
• flat·land·er -də(r) noun -s