Easton's Bible Dictionary (1897)
A boundary line indicated by a stone, stake, etc. (Deut. 19:14; 27:17; Prov. 22:28; 23:10; Job 24:2). Landmarks could not be removed without incurring the severe displeasure of God.
Hastings' Dictionary of the Bible (1898)
LAND'MARK. According to the ordinances given by Moses, the land, when conquered, was divided by lot and measurement among the tribes, families, and individuals of the nation. The lines separating one man's field from that of another were sometimes marked by rows of trees, but most often simply by a heap of stones at the corners. To remove these landmarks was easy enough, and hence the severe penalty incurred for doing it. Deut 19:14; Deut 27:17; Prov 23:10.
Schaff's Bible Dictionary
LAND'MARK. According to the ordinances given by Moses, the land, when conquered, was divided by lot and measurement among the tribes, families, and individuals of the nation. The lines separating one man's field from that of another were sometimes marked by rows of trees, but most often simply by a heap of stones at the corners. To remove these landmarks was easy enough, and hence the severe penalty incurred for doing it. Deut 19:14; Deut 27:17; Prov 23:10. LANES were narrow streets where the poorer people lived. Luke 14:21.