The Collaborative International Dictionary of English v.0.48:

Bloom \Bloom\, n. [AS. bl?ma a mass or lump, [imac]senes bl?ma a
   lump or wedge of iron.] (Metal.)
      (a) A mass of wrought iron from the Catalan forge or from
          the puddling furnace, deprived of its dross, and
          shaped usually in the form of an oblong block by
          shingling.
      (b) A large bar of steel formed directly from an ingot by
          hammering or rolling, being a preliminary shape for
          further working.
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bloom \Bloom\, n. [OE. blome, fr. Icel. bl?m, bl?mi; akin to Sw.
   blom, Goth. bl?ma, OS. bl?mo, D. bloem, OHG. bluomo, bluoma,
   G. blume; fr. the same root as AS. bl?wan to blow, blossom.
   See Blow to bloom, and cf. Blossom.]
   1. A blossom; the flower of a plant; an expanded bud;
      flowers, collectively.
      [1913 Webster]

            The rich blooms of the tropics.       --Prescott.
      [1913 Webster]

   2. The opening of flowers in general; the state of blossoming
      or of having the flowers open; as, the cherry trees are in
      bloom. "Sight of vernal bloom." --Milton.
      [1913 Webster]

   3. A state or time of beauty, freshness, and vigor; an
      opening to higher perfection, analogous to that of buds
      into blossoms; as, the bloom of youth.
      [1913 Webster]

            Every successive mother has transmitted a fainter
            bloom, a more delicate and briefer beauty.
                                                  --Hawthorne.
      [1913 Webster]

   4. The delicate, powdery coating upon certain growing or
      newly-gathered fruits or leaves, as on grapes, plums, etc.
      Hence: Anything giving an appearance of attractive
      freshness; a flush; a glow.
      [1913 Webster]

            A new, fresh, brilliant world, with all the bloom
            upon it.                              --Thackeray.
      [1913 Webster]

   5. The clouded appearance which varnish sometimes takes upon
      the surface of a picture.
      [1913 Webster]

   6. A yellowish deposit or powdery coating which appears on
      well-tanned leather. --Knight.
      [1913 Webster]

   7. (Min.) A popular term for a bright-hued variety of some
      minerals; as, the rose-red cobalt bloom.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bloom \Bloom\, v. i. [imp. & p. p. Bloomed; p. pr. & vb. n.
   Blooming.]
   1. To produce or yield blossoms; to blossom; to flower or be
      in flower.
      [1913 Webster]

            A flower which once
            In Paradise, fast by the tree of life,
            Began to bloom.                       --Milton.
      [1913 Webster]

   2. To be in a state of healthful, growing youth and vigor; to
      show beauty and freshness, as of flowers; to give promise,
      as by or with flowers.
      [1913 Webster]

            A better country blooms to view,

            Beneath a brighter sky.               --Logan.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bloom \Bloom\, v. t.
   1. To cause to blossom; to make flourish. [R.]
      [1913 Webster]

            Charitable affection bloomed them.    --Hooker.
      [1913 Webster]

   2. To bestow a bloom upon; to make blooming or radiant. [R.]
      --Milton.
      [1913 Webster]

            While barred clouds bloom the soft-dying day.
                                                  --Keats.
      [1913 Webster]

WordNet (r) 3.0 (2006):

bloom
    n 1: the organic process of bearing flowers; "you will stop all
         bloom if you let the flowers go to seed" [syn: blooming,
         bloom]
    2: reproductive organ of angiosperm plants especially one having
       showy or colorful parts [syn: flower, bloom, blossom]
    3: the best time of youth [syn: bloom, bloom of youth,
       salad days]
    4: a rosy color (especially in the cheeks) taken as a sign of
       good health [syn: bloom, blush, flush, rosiness]
    5: the period of greatest prosperity or productivity [syn:
       flower, prime, peak, heyday, bloom, blossom,
       efflorescence, flush]
    6: a powdery deposit on a surface [syn: efflorescence,
       bloom]
    v 1: produce or yield flowers; "The cherry tree bloomed" [syn:
         bloom, blossom, flower]

Moby Thesaurus II by Grady Ward, 1.0:

197 Moby Thesaurus words for "bloom":
   Hygeia, advance, anthesis, attain majority, attractiveness, bake,
   batten, be in bloom, be in flower, be in heat, beam, bear fruit,
   beauteousness, beautifulness, beauty, beauty unadorned,
   beggar description, black spot, blaze, blooming, blooping, blossom,
   blossoming, blow, blowing, blush, blushing, boil, boom,
   bring to maturity, broil, budtime, burgeon, burn, burst into bloom,
   burst with health, charm, choke, coloring, combust, come of age,
   come to fruition, come to maturity, cook, crimsoning, definition,
   develop, early years, effloresce, efflorescence, elegance,
   emotional health, enjoy good health, evolute, evolve,
   exquisiteness, fatten, feel fine, feel good, fieriness, fitness,
   flame, flame up, flare, flare up, fledge, flicker, floreate,
   florescence, floret, floriculture, floscule, flourish, flower,
   flowerage, floweret, flowering, flowering time, flush, flushing,
   fringe area, fry, full bloom, gardening, gasp, ghost, glow, grace,
   granulation, grid, grow, grow fat, grow up, handsomeness,
   hard shadow, health, hectic, hectic flush, horticulture, hortorium,
   image, incandesce, incandescence, jeunesse, juvenescence,
   juvenility, keep fit, knock dead, leave the nest, loveliness,
   mantling, maturate, mature, mellow, mental health, multiple image,
   my burning youth, my green age, never feel better, noise, pant,
   parch, physical condition, physical fitness, picture,
   picture noise, picture shifts, posy, prettiness, prime of life,
   progress, pulchritude, radiate heat, rain, reach its season,
   reach manhood, reach maturity, reach twenty-one, reach voting age,
   reddening, redness, ripe, ripen, roast, rolling, rosiness,
   rubefacient, rubescence, rufescence, salad days, scald,
   scanning pattern, scintillation, scorch, season, seedtime of life,
   seethe, settle down, shading, shimmer with heat, shine, simmer,
   smolder, smother, snow, snowstorm, spark, springtime of life,
   stay in shape, stay young, steam, stew, stifle, suffocate, sweat,
   swelter, temper, tender age, tenderness, the beautiful, thrive,
   toast, toga virilis, unfolding, unfoldment, wax, wear well,
   well-being, whiteness, wildflower, young blood, youngness, youth,
   youthfulness, youthhead, youthhood, youthiness