[1] : The Collaborative International Dictionary of English v.0.48

postal \post"al\, a. cf. f. postal.
   belonging to the post office or mail service; as, postal
   arrangements; postal authorities.
   1913 webster

   postal card, or post card, a card used for transmission
      of messages through the mails, at a lower rate of postage
      than a sealed letter; also called postcard. such cards
      are sold by the government with postage already paid, or
      by private vendors without a postage stamp. the message is
      written on one side of the card, and the address on the
      other.

   postal money order. see money order, under money.

   postal note, an order payable to bearer, for a sum of money
      in the united states less than five dollars under
      existing law, issued from one post office and payable at
      another specified office.

   postal union, a union for postal purposes entered into by
      the most important powers, or governments, which have
      agreed to transport mail matter through their several
      territories at a stipulated rate.
      1913 webster
see also:
postal card post card postcard postal money order money order money 
postal note postal union 

Note >> N Words
Note, definition of term: Note
note_pag1.html

Musical Note >> M Words
Musical Note, definition of term: Musical Note
musical+note_pag1.html

Half Note >> H Words
Half Note, definition of term: Half Note
half+note_pag1.html

Grace Note >> G Words
Grace Note, definition of term: Grace Note
grace+note_pag1.html

Government Note >> G Words
Government Note, definition of term: Government Note
government+note_pag1.html

Blue Note >> B Words
Blue Note, definition of term: Blue Note
blue+note_pag1.html