Source : Webster's Revised Unabridged Dictionary (1913)

Parcel post \Par"cel post\
   That branch of the post office having to do with the
   collection, transmission, and delivery of parcels. The
   British Inland Parcel Post was established in 1883. The
   present rates, dating from 1897, are 3d. for parcels not
   exceeding one pound and 1d. for each additional pound up to
   the limit of 10 pounds. A general parcel post was established
   in the United States by Act of August 24, 1912, which took
   effect Jan. 1, 1913. Parcels must not exceed 11 pounds in
   weight nor 72 inches in length and girth combined. Provision
   is made from insuring parcels up to $50.00, and also for
   sending parcels C.O.D. The rates of postage vary with the
   distance. See {Zone}, below.

Parcel \Par"cel\, n. [F. parcelle a small part, fr. (assumed)
   LL. particella, dim. of L. pars. See {Part}, n., and cf.
   {Particle}.]
   1. A portion of anything taken separately; a fragment of a
      whole; a part. [Archaic] ``A parcel of her woe.''
      --Chaucer.

            Two parcels of the white of an egg.   --Arbuthnot.

            The parcels of the nation adopted different forms of
            self-government.                      --J. A.
                                                  Symonds.

   2. (Law) A part; a portion; a piece; as, a certain piece of
      land is part and parcel of another piece.

   3. An indiscriminate or indefinite number, measure, or
      quantity; a collection; a group.

            This youthful parcel Of noble bachelors stand at my
            disposing.                            --Shak.

   4. A number or quantity of things put up together; a bundle;
      a package; a packet.

            'Tis like a parcel sent you by the stage. --Cowper.

   {Bill of parcels}. See under 6th {Bill}.

   {Parcel office}, an office where parcels are received for
      keeping or forwarding and delivery.

   {Parcel post}, that department of the post office concerned
      with the collection and transmission of parcels.

   {Part and parcel}. See under {Part}.

Source : WordNet®

parcel post
     n : postal service that handles packages