(1) A monument marking a point, on an irregular boundary line, reservation line, boundary of a private claim, or a re established, non riparian meander line, at which a change in azimuth occurs.

(2) A stake driven into the ground at a point on a traverse, to indicate a change in direction of the traverse at that point.

(3) A point, in a survey, at which the alinement or boundary deflects from its previous course.

(4) A marker placed to indicate a point at which there is a change in the direction of a surveyed line.