The Collaborative International Dictionary of English v.0.48:

Level \Lev"el\ (l[e^]v"[e^]l), a.
   1. Even; flat; having no part higher than another; having, or
      conforming to, the curvature which belongs to the
      undisturbed liquid parts of the earth's surface; as, a
      level field; level ground; the level surface of a pond or
      lake.
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            Ample spaces o'er the smooth
            And level pavement.                   --Milton.
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   2. Coinciding or parallel with the plane of the horizon;
      horizontal; as, the telescope is now level.
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   3. Even with anything else; of the same height; on the same
      line or plane; on the same footing; of equal importance;
      -- followed by with, sometimes by to.
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            Young boys and girls
            Are level now with men; the odds is gone. --Shak.
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            Everything lies level to our wish.    --Shak.
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   4. Straightforward; direct; clear; open.
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            A very plain and level account.       --M. Arnold.
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   5. Well balanced; even; just; steady; impartial; as, a level
      head; a level understanding. [Colloq.] " A level
      consideration." --Shak.
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   6. (Phonetics) Of even tone; without rising or falling
      inflection. --H. Sweet.
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   Level line (Shipbuilding), the outline of a section which
      is horizontal crosswise, and parallel with the rabbet of
      the keel lengthwise.

   Level surface (Physics), an equipotential surface at right
      angles at every point to the lines of force.
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