noun a specific identifiable position in a continuum or series or especially in a process
noun indicator that establishes the horizontal when a bubble is centered in a tube of liquid
noun a flat surface at right angles to a plumb line
noun a structure consisting of a room or set of rooms at a single position along a vertical scale
verb tear down so as to make flat with the ground
verb become level or even
adjective having a surface without slope, tilt in which no part is higher or lower than another
adjective being on a precise horizontal plane
adjective oriented at right angles to the plumb
Source: WordNet 3.1, Princeton University
