Artificial intelligent assistant

post-bag

ˈpost-bag
  [f. post n.2 + bag n.]
  A bag for carrying letters and other postal matter; a mail-bag; transf. the number of letters, etc. delivered to or sent from any house or person.

1813 Moore Post-bag 284 The honour and delight of first ransacking the Post Bag. 1832 Babbage Econ. Manuf. xxviii. (ed. 3) 273 The Post-bag despatched every evening to one of our largest cities, Bristol, usually weighs less than a hundred pounds. 1855 Macaulay Hist. Eng. xvi. III. 657. 1883 J. Martin Remin. Old Haddington 227 Post-bags were carried on horseback from Edinburgh to London. 1898 Tit Bits 23 July 322/2 The Prince of Wales has the biggest post-bag of any of the Royalties.

Oxford English Dictionary

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