Definition of high private in US English:

high private

noun

US
Military
informal, rare, historical
  • 1(With reference to the U.S. Military Academy at West Point, N.Y.) a cadet in the fourth and final year, especially one who has not attained cadet officer rank.

  • 2An ordinary private soldier; a private.

Origin

Mid 19th century; earliest use found in Christian Intelligencer.