noun the act or operation of making level.
2. leveling ·p.pr. & ·vb.n. of level.
3. 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.