means placed. (Latin, positus.)
A piece of timber placed in the ground. A military post. A
station where a man is placed, with instructions not to quit it without
orders. An official post is where a man is placed in office.
To post accounts
is to place them under certain heads in methodical order. (
Trench. Post haste. Travelling by relays of horses, or where horses
are placed on the road to expedite the journey, Post office. An
office where letters are placed.
So called from its watermark, a post-horn, or a post-boy blowing
“The old original post [paper] with the stamp in the corner
representing a post-boy riding for life, and twanging his horn.” —Mrs. Gaskell: Cranford, chap. v.
Stiff as a post.
That is, stiff [in the ground] like a gate-post. To run your
head against a post. To go to work heedlessly and stupidly, or as
if you had no eyes.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894