The Collaborative International Dictionary of English v.0.48:

Tariff \Tar"iff\, v. t. [imp. & p. p. Tariffed; p. pr. & vb.
   n. Tariffing.]
   To make a list of duties on, as goods.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Tariff \Tar"iff\, n. [F. tarif; cf. Sp. & Pg. tarifa, It.
   tariffa; all fr. Ar. ta'r[imac]f information, explanation,
   definition, from 'arafa, to know, to inform, explain.]
   1. A schedule, system, or scheme of duties imposed by the
      government of a country upon goods imported or exported;
      as, a revenue tariff; a protective tariff; Clay's
      compromise tariff. (U. S. 1833).
      [1913 Webster]

   Note: The United States and Great Britain impose no duties on
         exports; hence, in these countries the tariff refers
         only to imports.
         [1913 Webster]

   Note: A tariff may be imposed solely for, and with reference
         to, the production of revenue (called a

   revenue tariff, or

   tariff for revenue, or for the artificial fostering of home
      industries (

   a projective tariff), or as a means of coercing foreign
      governments, as in case of

   retaliatory tariff.
      [Webster 1913 Suppl.]

   2. The duty, or rate of duty, so imposed; as, the tariff on
      wool; a tariff of two cents a pound.
      [1913 Webster]

   3. Any schedule or system of rates, changes, etc.; as, a
      tariff of fees, or of railroad fares. --Bolingbroke.
      [1913 Webster]

WordNet (r) 3.0 (2006):

tariff
    n 1: a government tax on imports or exports; "they signed a
         treaty to lower duties on trade between their countries"
         [syn: duty, tariff]
    v 1: charge a tariff; "tariff imported goods"

The Devil's Dictionary (1881-1906):

TARIFF, n.  A scale of taxes on imports, designed to protect the
domestic producer against the greed of his consumer.

    The Enemy of Human Souls
    Sat grieving at the cost of coals;
    For Hell had been annexed of late,
    And was a sovereign Southern State.

    "It were no more than right," said he,
    "That I should get my fuel free.
    The duty, neither just nor wise,
    Compels me to economize --
    Whereby my broilers, every one,
    Are execrably underdone.
    What would they have? -- although I yearn
    To do them nicely to a turn,
    I can't afford an honest heat.
    This tariff makes even devils cheat!
    I'm ruined, and my humble trade
    All rascals may at will invade:
    Beneath my nose the public press
    Outdoes me in sulphureousness;
    The bar ingeniously applies
    To my undoing my own lies;
    My medicines the doctors use
    (Albeit vainly) to refuse
    To me my fair and rightful prey
    And keep their own in shape to pay;
    The preachers by example teach
    What, scorning to perform, I teach;
    And statesmen, aping me, all make
    More promises than they can break.
    Against such competition I
    Lift up a disregarded cry.
    Since all ignore my just complaint,
    By Hokey-Pokey!  I'll turn saint!"
    Now, the Republicans, who all
    Are saints, began at once to bawl
    Against _his_ competition; so
    There was a devil of a go!
    They locked horns with him, tete-a-tete
    In acrimonious debate,
    Till Democrats, forlorn and lone,
    Had hopes of coming by their own.
    That evil to avert, in haste
    The two belligerents embraced;
    But since 'twere wicked to relax
    A tittle of the Sacred Tax,
    'Twas finally agreed to grant
    The bold Insurgent-protestant
    A bounty on each soul that fell
    Into his ineffectual Hell.
                                                            Edam Smith