Landmark in the Bible Encyclopedia - ISBE
land'-mark (gebhul, literally, "boundary"): The boundary may
have been marked, as at present, simply by a furrow or stone.
The iniquity of removing a landmark is frequently insisted on
(Dt 19:14; 27:17; Prov 22:28; 23:10; Job 24:2 gebhulah), its
removal being equivalent to theft.