When we lost our cat, we 'posted' (up) signs all over the neighborhood asking if people had seen him.
a horse's 'post position' [=the position of a horse in the line of horses at the start of a race]
No matter what happens, do not abandon your 'post'. [=do not leave your assigned area]
(..) Dialogue: Marked=..,Default,NTP,!Effect,ln my opinion, best day of the week.\NWhy is that, Dudley? Dialogue: Marked=..,Default,NTP,!Effect,-Because there's no post on Sundays?\N-Right you are, Harry! Dialogue: Marked=..,Default,NTP,!Effect,No post on Sunday. (..)2001 Harry Potter and the Sorcerer's Stone
(..) Dialogue: Marked=..,Default,NTP,!Effect,It'll fit you well enough. Dialogue: Marked=..,Default,NTP,!Effect,Go get the post. Go! Dialogue: Marked=..,Default,NTP,!Effect,Marge is ill. Ate a funny whelk. Dialogue: Marked=..,Default,NTP,!Effect,Yours? Who'd be writing to you? (..)2001 Harry Potter and the Sorcerer's Stone