Echelon (Noun)
Meaning 1
A diffraction grating consisting of a pile of plates of equal thickness arranged stepwise with a constant offset.
Classification
Nouns denoting man-made objects.
Hypernyms
Meaning 2
Status in a society or organization; "the upper echelon".
Classification
Nouns denoting natural processes.
Hypernyms
Meaning 3
A body of troops arranged in a line.
Classification
Nouns denoting groupings of people or objects.