'Border' in the Bible

Thus said Jehovah: For three transgressions of the sons of Ammon, And for four, I do not reverse it, Because of their ripping up the pregnant ones of Gilead, To enlarge their border,

Pass ye over to Calneh and see, And go thence to Hamath the great, And go down to Gath of the Philistines, Are they better than these kingdoms? Greater is their border than your border?