The Collaborative International Dictionary of English v.0.48:

Weigh \Weigh\, v. t. [imp. & p. p. Weighed; p. pr. & vb. n.
   Weighing.] [OE. weien, weyen, weghen, AS. wegan to bear,
   move; akin to D. wegen to weigh, G. w[aum]gen, wiegen, to
   weigh, bewegen to move, OHG. wegan, Icel. vega to move,
   carry, lift, weigh, Sw. v[aum]ga to weigh, Dan. veie, Goth.
   gawigan to shake, L. vehere to carry, Skr. vah. ????. See
   Way, and cf. Wey.]
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   1. To bear up; to raise; to lift into the air; to swing up;
      as, to weigh anchor. "Weigh the vessel up." --Cowper.
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   2. To examine by the balance; to ascertain the weight of,
      that is, the force with which a thing tends to the center
      of the earth; to determine the heaviness, or quantity of
      matter of; as, to weigh sugar; to weigh gold.
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            Thou art weighed in the balances, and art found
            wanting.                              --Dan. v. 27.
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   3. To be equivalent to in weight; to counterbalance; to have
      the heaviness of. "A body weighing divers ounces."
      --Boyle.
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   4. To pay, allot, take, or give by weight.
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            They weighed for my price thirty pieces of silver.
                                                  --Zech. xi.
                                                  12.
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   5. To examine or test as if by the balance; to ponder in the
      mind; to consider or examine for the purpose of forming an
      opinion or coming to a conclusion; to estimate
      deliberately and maturely; to balance.
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            A young man not weighed in state affairs. --Bacon.
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            Had no better weighed
            The strength he was to cope with, or his own.
                                                  --Milton.
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            Regard not who it is which speaketh, but weigh only
            what is spoken.                       --Hooker.
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            In nice balance, truth with gold she weighs. --Pope.
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            Without sufficiently weighing his expressions. --Sir
                                                  W. Scott.
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   6. To consider as worthy of notice; to regard. [Obs. or
      Archaic] "I weigh not you." --Shak.
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            All that she so dear did weigh.       --Spenser.
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   To weigh down.
      (a) To overbalance.
      (b) To oppress with weight; to overburden; to depress. "To
          weigh thy spirits down." --Milton.
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The Collaborative International Dictionary of English v.0.48:

Weigh \Weigh\ (w[=a]), n. (Naut.)
   A corruption of Way, used only in the phrase under weigh.
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         An expedition was got under weigh from New York.
                                                  --Thackeray.
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         The Athenians . . . hurried on board and with
         considerable difficulty got under weigh. --Jowett
                                                  (Thucyd.).
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The Collaborative International Dictionary of English v.0.48:

Weigh \Weigh\, v. i.
   1. To have weight; to be heavy. "They only weigh the
      heavier." --Cowper.
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   2. To be considered as important; to have weight in the
      intellectual balance.
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            Your vows to her and me . . . will even weigh.
                                                  --Shak.
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            This objection ought to weigh with those whose
            reading is designed for much talk and little
            knowledge.                            --Locke.
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   3. To bear heavily; to press hard.
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            Cleanse the stuffed bosom of that perilous stuff
            Which weighs upon the heart.          --Shak.
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   4. To judge; to estimate. [R.]
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            Could not weigh of worthiness aright. --Spenser.
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   To weigh down, to sink by its own weight.
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The Collaborative International Dictionary of English v.0.48:

Weigh \Weigh\, n. [See Wey.]
   A certain quantity estimated by weight; an English measure of
   weight. See Wey.
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WordNet (r) 3.0 (2006):

weigh
    v 1: have a certain weight
    2: show consideration for; take into account; "You must consider
       her age"; "The judge considered the offender's youth and was
       lenient" [syn: consider, count, weigh]
    3: determine the weight of; "The butcher weighed the chicken"
       [syn: weigh, librate]
    4: have weight; have import, carry weight; "It does not matter
       much" [syn: count, matter, weigh]
    5: to be oppressive or burdensome; "weigh heavily on the mind",
       "Something pressed on his mind" [syn: weigh, press]

Moby Thesaurus II by Grady Ward, 1.0:

148 Moby Thesaurus words for "weigh":
   amount to something, analogize, appraise, appreciate, assay,
   assess, assimilate, balance, be abstracted, be featured, be heavy,
   be influential, be persuasive, be prominent, be somebody,
   be something, bring into analogy, bring into comparison, brood,
   calculate, calibrate, caliper, carry, carry weight, catalog,
   categorize, charge, check a parameter, chew the cud, class,
   classify, compare, compare and contrast, compare with, compute,
   confront, consider, contemplate, contrast, count, counterbalance,
   counterpose, cumber, cut ice, cut some ice, debate, deliberate,
   dial, digest, divide, draw a comparison, draw a parallel, encumber,
   estimate, evaluate, excogitate, factor, fathom, gauge,
   get top billing, graduate, group, have an in, have full play,
   have influence, have personality, have pull, have weight, heft,
   hold the scales, identify, import, introspect, lade, lie heavy,
   liken, liken to, load, lumber, match, matter, measure,
   measure against, meditate, mensurate, metaphorize, mete, meter,
   militate, mind, muse, oppose, pace, parallel, perpend,
   place against, play around with, play with, plumb, ponder, prize,
   probe, quantify, quantize, rate, reflect, register, relate,
   ruminate, run a comparison, saddle, set in contrast,
   set in opposition, set off against, set over against, sift,
   signify, similize, size, size up, sort, sort out, sound, span,
   speculate, stand out, star, step, strike a balance, study, survey,
   take a reading, tax, tell, think over, thrash out, tip the scales,
   toy with, triangulate, valuate, value, view together,
   weigh against, weigh heavy, weigh in, weigh out, weight, winnow