The Collaborative International Dictionary of English v.0.48:

Great \Great\ (gr[=a]t), a. [Compar. Greater; superl.
   Greatest.] [OE. gret, great, AS. gre['a]t; akin to OS. &
   LG. gr[=o]t, D. groot, OHG. gr[=o]z, G. gross. Cf. Groat
   the coin.]
   1. Large in space; of much size; big; immense; enormous;
      expanded; -- opposed to small and little; as, a great
      house, ship, farm, plain, distance, length.
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   2. Large in number; numerous; as, a great company, multitude,
      series, etc.
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   3. Long continued; lengthened in duration; prolonged in time;
      as, a great while; a great interval.
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   4. Superior; admirable; commanding; -- applied to thoughts,
      actions, and feelings.
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   5. Endowed with extraordinary powers; uncommonly gifted; able
      to accomplish vast results; strong; powerful; mighty;
      noble; as, a great hero, scholar, genius, philosopher,
      etc.
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   6. Holding a chief position; elevated: lofty: eminent;
      distinguished; foremost; principal; as, great men; the
      great seal; the great marshal, etc.
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            He doth object I am too great of birth. --Shak.
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   7. Entitled to earnest consideration; weighty; important; as,
      a great argument, truth, or principle.
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   8. Pregnant; big (with young).
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            The ewes great with young.            --Ps. lxxviii.
                                                  71.
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   9. More than ordinary in degree; very considerable in degree;
      as, to use great caution; to be in great pain.
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            We have all
            Great cause to give great thanks.     --Shak.
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   10. (Genealogy) Older, younger, or more remote, by single
       generation; -- often used before grand to indicate one
       degree more remote in the direct line of descent; as,
       great-grandfather (a grandfather's or a grandmother's
       father), great-grandson, etc.
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   Great bear (Astron.), the constellation Ursa Major.

   Great cattle (Law), all manner of cattle except sheep and
      yearlings. --Wharton.

   Great charter (Eng. Hist.), Magna Charta.

   Great circle of a sphere, a circle the plane of which
      passes through the center of the sphere.

   Great circle sailing, the process or art of conducting a
      ship on a great circle of the globe or on the shortest arc
      between two places.

   Great go, the final examination for a degree at the
      University of Oxford, England; -- called also greats.
      --T. Hughes.

   Great guns. (Naut.) See under Gun.

   The Great Lakes the large fresh-water lakes (Lakes
      Superior, Michigan, Huron, Erie, and Ontario) which lie on
      the northern borders of the United States.

   Great master. Same as Grand master, under Grand.

   Great organ (Mus.), the largest and loudest of the three
      parts of a grand organ (the others being the choir organ
      and the swell, and sometimes the pedal organ or foot
      keys), It is played upon by a separate keyboard, which has
      the middle position.

   The great powers (of Europe), in modern diplomacy, Great
      Britain, France, Germany, Austria, Russia, and Italy.

   Great primer. See under Type.

   Great scale (Mus.), the complete scale; -- employed to
      designate the entire series of musical sounds from lowest
      to highest.

   Great sea, the Mediterranean sea. In Chaucer both the Black
      and the Mediterranean seas are so called.

   Great seal.
       (a) The principal seal of a kingdom or state.
       (b) In Great Britain, the lord chancellor (who is
           custodian of this seal); also, his office.

   Great tithes. See under Tithes.

   The great, the eminent, distinguished, or powerful.

   The Great Spirit, among the North American Indians, their
      chief or principal deity.

   To be great (with one), to be intimate or familiar (with
      him). --Bacon.
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The Collaborative International Dictionary of English v.0.48:

Bear \Bear\ (b[^a]r), n. [OE. bere, AS. bera; akin to D. beer,
   OHG. bero, pero, G. b[aum]r, Icel. & Sw. bj["o]rn, and
   possibly to L. fera wild beast, Gr. fh`r beast, Skr. bhalla
   bear.]
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   1. (Zool.) Any species of the genus Ursus, and of the
      closely allied genera. Bears are plantigrade Carnivora,
      but they live largely on fruit and insects.
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   Note: The European brown bear (Ursus arctos), the white
         polar bear (Ursus maritimus), the grizzly bear
         (Ursus horribilis), the American black bear, and its
         variety the cinnamon bear (Ursus Americanus), the
         Syrian bear (Ursus Syriacus), and the sloth bear, are
         among the notable species.
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   2. (Zool.) An animal which has some resemblance to a bear in
      form or habits, but no real affinity; as, the woolly bear;
      ant bear; water bear; sea bear.
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   3. (Astron.) One of two constellations in the northern
      hemisphere, called respectively the Great Bear and the
      Lesser Bear, or Ursa Major and Ursa Minor.
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   4. Metaphorically: A brutal, coarse, or morose person.
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   5. (Stock Exchange) A person who sells stocks or securities
      for future delivery in expectation of a fall in the
      market.
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   Note: The bears and bulls of the Stock Exchange, whose
         interest it is, the one to depress, and the other to
         raise, stocks, are said to be so called in allusion to
         the bear's habit of pulling down, and the bull's of
         tossing up.
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   6. (Mach.) A portable punching machine.
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   7. (Naut.) A block covered with coarse matting; -- used to
      scour the deck.
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   Australian bear. (Zool.) See Koala.

   Bear baiting, the sport of baiting bears with dogs.

   Bear caterpillar (Zool.), the hairy larva of a moth, esp.
      of the genus Euprepia.

   Bear garden.
      (a) A place where bears are kept for diversion or
          fighting.
      (b) Any place where riotous conduct is common or
          permitted. --M. Arnold.

   Bear leader, one who leads about a performing bear for
      money; hence, a facetious term for one who takes charge of
      a young man on his travels.
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WordNet (r) 3.0 (2006):

Great Bear
    n 1: a constellation outside the zodiac that rotates around the
         North Star [syn: Great Bear, Ursa Major]