noun
1.
the physical configuration and features of a tract of land
made an analysis of the terrain via aerial photos
Synonyms: topography
Related Word: contour, form, profile, shape
2.
an area devoted to a specified activity
the whole county had become breeding and racing terrain
Synonyms: territory, turf
3.
Synonyms: field , bailiwick, champaign, demesne, domain, dominion, province, sphere, territory, walk