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1.
Someone of a more junior nature. Opposite of seniority.
She showed her juniority in the task at hand.

Her juniority really began to show.
by brokenhead113 November 13, 2013
 
2.
Commonly used in marching band, it forces all underclassmen to give up what they have for the Juniors.
However can be over ruled by Seniority.

Sophmores are cool with it

Freshman- either are cool with it or are stinkers.
Junior- Juniority!
Sophmore- Fine heres my taco...
Junior- Sweet!
by Jbean13 August 11, 2010
 
3.
That which lacks a more senior status.
If need exists after volunteer list is exhausted, assignment will be made by juniority.
by Michael J. Murphy November 01, 2006