she posted with her body against the back of the seat

[constantinusphilo]

I do not understand the meaning of 'posted' here. The original quote is from The Sheltering Sky by Paul Bowls as follows:

For a few minutes she tried to break the jolts of the bus for him by posting with her body against the back of the seat, but her muscles soon tired.

 

[Tarheel]

Maybe she braced herself against the anticipated jolts.

 

[Charlie Bernstein]

It would be good to know more of the context. From what you have there, it sounds like she's bouncing up and down like a horseback rider to make him (whoever he is) more comfortable.

The verb post is a horseback riding term.

 

[Tarheel]

Somehow I missed the "for him" part. Unfortunately, with that in there it's less clear to me what she's doing. More context might help.

 

[tedmc]

She was trying to be his shock absorber, cushioning all the impacts for him.

 

[emsr2d2]

Make sure you ask us about the exact word. You asked why "posted" was used but then gave us a sentence that didn't include "posted".