D defs.my
Entry 1 sense Webster, 1913

Cossack post

· Cos·sack post · IPA
01 An outpost consisting of four men, forming one of a single line of posts substituted for the more formal line of sentinels and line of pickets.
  1. 1.
    An outpost consisting of four men, forming one of a single line of posts substituted for the more formal line of sentinels and line of pickets.(Mil.)