Definitions for olive drab
Random House Webster's College Dictionary
a deep olive color.
woolen cloth of this color, used esp. for military uniforms.
Usu., olive drabs. a military uniform made from this cloth.
Origin of olive drab:
olive drab, drab(noun)
a dull greyish to yellowish or light olive brown
olive drab, olive-drab uniform(noun)
military uniform of the United States Army; made from cloth of a dull olive color
a cloth of an olive-brown color used for military uniforms
of a light brownish green color
Cloth of an olive drab colour, used often for military uniforms.
Of a greyish green colour, like that of a ripe green olive.