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post 3 (pōst)
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n.
1. Chiefly British
a. A postal system.
b. A post office.
c. A delivery or amount of mail: waiting for the morning's post to arrive.
2. Obsolete
a. One of a series of relay stations along a fixed route, furnishing fresh riders and horses for the delivery of mail on horseback.
b. A rider on such a mail route; a courier.
v. post·ed, post·ing, posts
v.tr.
1. Chiefly British To mail (a letter or package).
2. Archaic To send by mail in a system of relays on horseback.
3. To inform of the latest news: Keep us posted.
4.
a. To transfer (an item) to a ledger in bookkeeping.
b. To make the necessary entries in (a ledger).
5. Computers To enter (a unit of information) on a record or into a section of storage.
v.intr.
1. Archaic
a. To travel in stages or relays.
b. To travel with speed or in haste.
2. To bob up and down in the saddle in rhythm with a horse's trotting gait.
adv.
Archaic
1. With great speed; rapidly.
2. By post horse.

[French poste, from Old French, relay station for horses, from Old Italian posta, from Vulgar Latin *posta, station, from Latin posita, feminine past participle of pōnere, to place; see apo- in the Appendix of Indo-European roots.]

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
 

Indo-European & Semitic Roots Appendices

    Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

    Indo-European Roots

    Semitic Roots

    The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.