Source : Webster's Revised Unabridged Dictionary (1913)

Crude \Crude\ (kr[udd]d), a. [Compar. {Cruder} (-[~e]r); superl.
   {Crudest}.] [L. crudus raw; akin to cruor blood (which flows
   from a wound). See {Raw}, and cf. {Cruel}.]
   1. In its natural state; not cooked or prepared by fire or
      heat; undressed; not altered, refined, or prepared for use
      by any artificial process; raw; as, crude flesh. ``Common
      crude salt.'' --Boyle.

            Molding to its will each successive deposit of the
            crude materials.                      --I. Taylor.

   2. Unripe; not mature or perfect; immature.

            I come to pluck your berries harsh and crude.
                                                  --Milton.

   3. Not reduced to order or form; unfinished; not arranged or
      prepared; ill-considered; immature. ``Crude projects.''
      --Macaulay.

            Crude, undigested masses of suggestion, furnishing
            rather raw materials for composition. --De Quincey.

            The originals of Nature in their crude Conception.
                                                  --Milton.

   4. Undigested; unconcocted; not brought into a form to give
      nourishment. ``Crude and inconcoct.'' --Bacon.

   5. Having, or displaying, superficial and undigested
      knowledge; without culture or profundity; as, a crude
      reasoner.

   6. (Paint.) Harsh and offensive, as a color; tawdry or in bad
      taste, as a combination of colors, or any design or work
      of art.

Source : WordNet®

crude
     adj 1: not carefully or expertly made; "managed to make a crude
            splint"; "a crude cabin of logs with bark still on
            them"; "rough carpentry" [syn: {rough}]
     2: conspicuously and tastelessly indecent; "coarse language";
        "a crude joke"; "crude behavior"; "an earthy sense of
        humor"; "a revoltingly gross expletive"; "a vulgar
        gesture"; "full of language so vulgar it should have been
        edited" [syn: {coarse}, {earthy}, {gross}, {vulgar}]
     3: not refined or processed; "unrefined ore"; "crude oil" [syn:
         {unrefined}, {unprocessed}] [ant: {refined}]
     4: belonging to an early stage of technical development;
        characterized by simplicity and (often) crudeness; "the
        crude weapons and rude agricultural implements of early
        man"; "primitive movies of the 1890s"; "primitive living
        conditions in the Appalachian mountains" [syn: {primitive},
         {rude}]
     5: devoid of any qualifications or disguise or adornment; "the
        blunt truth"; "the crude facts"; "facing the stark reality
        of the deadline" [syn: {blunt}, {crude(a)}, {stark(a)}]
     6: not processed or subjected to analysis; "raw data"; "the raw
        cost of production"; "only the crude vital statistics"
        [syn: {raw}]

crude
     n : a dark oil consisting mainly of hydrocarbons [syn: {petroleum},
          {crude oil}, {rock oil}, {fossil oil}]