level

1 : a device for establishing a horizontal line or plane by means of a bubble in a liquid that shows adjustment to the horizontal by movement to the center of a slightly bowed glass tube

2 : a measurement of the difference of altitude of two points by means of a level

3 : horizontal condition especially : equilibrium of a fluid marked by a horizontal surface of even altitude water seeks its own level

4a : an approximately horizontal line or surface taken as an index of altitude Charts were arranged at eye level.

b : a practically horizontal surface or area (as of land) the level of the plateau

5 : a position in a scale or rank (as of achievement, significance, or value) funded at the national level the job appeals to me on many levels

6a : a line or surface that cuts perpendicularly all plumb lines that it meets and hence would everywhere coincide with a surface of still water

b : the plane of the horizon or a line in it

7 : a horizontal passage in a mine intended for regular working and transportation

8 : a concentration of a constituent especially of a body fluid (such as blood) a normal blood-sugar level

9 : the magnitude of a quantity considered in relation to an arbitrary reference value broadly : magnitude, intensity a high level of hostility

Definition of level

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