Post2  —n. 1 official conveyance of parcels, letters, etc. (send it by post). 2 single collection or delivery of these; the letters etc. Dispatched (has the post arrived?). 3 place where letters etc. Are collected (take it to the post). —v. 1 put (a letter etc.) In the post. 2 (esp. As posted adj.) (often foll. By up) supply with information (keep me posted). 3  a enter (an item) in a ledger. B (often foll. By up) complete (a ledger) in this way. [latin: related to *position]