Main Entry: ter·rain

Pronunciation: \tə-ˈrān also te-\

Function: noun

Etymology: French, land, ground, from Old French terrein, from Vulgar Latin *terranum, alteration of Latin terrenum, from neuter of terrenus of earth — more at terrene

Date: 1766

1 a (1) : a geographic area (2) : a piece of land : ground b : the physical features of a tract of land
2 : terrane 1
3 a : a field of knowledge or interest : territory b : environment, milieu