olive drab

noun, plural olive drabs for 3.

1. a deep olive color.
2. woolen cloth of this color, used especially for U.S. Army uniforms.
3. a military uniform made from this cloth.

noun US

1. 1. a dull but fairly strong greyish-olive colour
   2. (as adjective)an olive-drab jacket
2. cloth or clothes in this colour, esp the uniform of the US ArmyAbbreviation: OD