Relative position or rank on a scale: the local level of government; studying at the graduate level. A relative degree, as of achievement, intensity, or concentration: an unsafe level of toxicity; a high level of frustration. A natural or proper position, place, or stage: I finally found my own level in the business world. Position along a vertical axis; height or depth: a platform at knee level. A horizontal line or plane at right angles to the plumb. The position or height of such a line or plane. A flat, horizontal surface. A land area of uniform elevation. An instrument for ascertaining whether a surface is horizontal, vertical, or at a 45\u00b0 angle, consisting essentially of an encased, liquid-filled tube containing an air bubble that moves to a center window when the instrument is set on an even plane. Also called spirit level. Such a device combined with a telescope and used in surveying. A computation of the difference in elevation between two points by using such a device. Having a flat, smooth surface. Being on a horizontal plane. Being at the same height or position as another; even. Being at the same degree of rank, standing, or advantage as another; equal. Being or relating to a specified rank or standing. Often used in combination: a lower-level administrator. Exhibiting no abrupt variations; steady: spoke in a level tone. Rational and balanced; sensible: came to a level appraisal of the situation; keeps a level head in an emergency. Filled evenly to the top: a level tablespoon of the medicine. To make horizontal, flat, or even: leveled the driveway with a roller; leveled off the hedges with the clippers. To tear down; raze. To knock down with or as if with a blow: The challenger leveled the champion with a mighty uppercut. To place on the same level; equalize. To aim along a horizontal plane: leveled the gun at the target. To direct emphatically or forcefully toward someone: leveled charges of dishonesty.