Leveling

·noun The act or operation of making level.

II. Leveling ·p.pr. & ·vb.n. of Level.

III. Leveling ·noun The art or operation of using a leveling instrument for finding a horizontal line, for ascertaining the differences of level between different points of the earth's surface included in a survey, for establishing grades, ·etc., as in finding the descent of a river, or locating a line of railroad.