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Echelon
01
a diffraction grating consisting of a pile of plates of equal thickness arranged stepwise with a constant offset
02
a diagonal formation of things, especially used in military troops
03
a level or rank in an organization, profession, or society, indicating a person's status or authority within that hierarchy
Example
She worked hard for years to reach the upper echelons of the corporate world.
His promotion moved him into the top echelon of academic researchers in his field.
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