The Collaborative International Dictionary of English v.0.48:

Loom \Loom\ (l[=oo]m), n. (Zool.)
   See Loon, the bird.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Loom \Loom\ (l[=oo]m), n. [OE. lome, AS. gel[=o]ma utensil,
   implement.]
   [1913 Webster]
   1. A frame or machine of wood or other material, in which a
      weaver forms cloth out of thread; a machine for
      interweaving yarn or threads into a fabric, as in knitting
      or lace making.
      [1913 Webster]

            Hector, when he sees Andromache overwhelmed with
            terror, sends her for consolation to the loom and
            the distaff.                          --Rambler.
      [1913 Webster]

   2. (Naut.) That part of an oar which is near the grip or
      handle and inboard from the rowlock. --Totten.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Loom \Loom\, n.
   The state of looming; esp., an unnatural and indistinct
   appearance of elevation or enlargement of anything, as of
   land or of a ship, seen by one at sea.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Loom \Loom\ (l[=oo]m), v. i. [imp. & p. p. Loomed (l[=oo]md);
   p. pr. & vb. n. Looming.] [OE. lumen to shine, Icel. ljoma;
   akin to AS. le['i]ma light, and E. light; or cf. OF. lumer to
   shine, L. luminare to illumine, lumen light; akin to E.
   light. [root]122. See Light not dark.]
   1. To appear above the surface either of sea or land, or to
      appear enlarged, or distorted and indistinct, as a distant
      object, a ship at sea, or a mountain, esp. from
      atmospheric influences; as, the ship looms large; the land
      looms high.
      [1913 Webster]

            Awful she looms, the terror of the main. --H. J.
                                                  Pye.
      [1913 Webster]

   2. To rise and to be eminent; to be elevated or ennobled, in
      a moral sense.
      [1913 Webster]

            On no occasion does he [Paul] loom so high, and
            shine so gloriously, as in the context. --J. M.
                                                  Mason.
      [1913 Webster]

   3. To become imminent; to impend.
      [PJC]

WordNet (r) 3.0 (2006):

loom
    n 1: a textile machine for weaving yarn into a textile
    v 1: come into view indistinctly, often threateningly; "Another
         air plane loomed into the sky"
    2: appear very large or occupy a commanding position; "The huge
       sculpture predominates over the fountain"; "Large shadows
       loomed on the canyon wall" [syn: loom, tower,
       predominate, hulk]
    3: hang over, as of something threatening, dark, or menacing;
       "The terrible vision brooded over her all day long" [syn:
       brood, hover, loom, bulk large]
    4: weave on a loom; "materials loomed in Egypt"

Moby Thesaurus II by Grady Ward, 1.0:

157 Moby Thesaurus words for "loom":
   anticipate, appear, approach, arise, ascend, await, be destined,
   be fated, be imminent, be in store, be to be, be to come,
   become manifest, become visible, braid, brew, bulk, bulk large,
   come, come forth, come forward, come in sight, come on, come out,
   come to hand, come to light, come up, coming, confront, crop out,
   curl upwards, dominate, draw near, draw nigh, draw on, emerge,
   enlace, enter, entwine, exceed, expect, face, fade in, foresee,
   foretell, forthcome, forthcoming, futurity, gather, go up, grow up,
   hand loom, hang over, heave in sight, hope, hover, hover over,
   immediate future, imminence, impend, impendence, impendency,
   interknit, interlace, intertie, intertissue, intertwine,
   intertwist, interweave, intort, issue, issue forth, knit,
   knitting machine, lace, levitate, lie ahead, lie over, look for,
   look forth, look forward to, loom large, loop, lower, make up, mat,
   materialize, menace, mount, near, near future, net, noose, outcrop,
   outsoar, outstrip, overhang, overshadow, overtop, peep out, plait,
   plan, pleach, plot, predict, predominate, project, prophesy,
   raddle, rear, rear its head, rear up, rise, rise above, rise up,
   see the light, show, show up, shuttle, soar, spiral, spire, splice,
   stand out, stand up, stream forth, strike the eye, surface, surge,
   swarm up, sweep up, take form, take shape, threaten, tissue, tower,
   tower above, transcend, turn up, twill, twine, twist, up, upgo,
   upgrow, upheave, uprise, upspin, upstream, upsurge, upswarm,
   upwind, wattle, weave, weaver, web, wreathe