The Collaborative International Dictionary of English v.0.48:

Erect \E*rect"\, a. [L. erectus, p. p. of erigere to erect; e
   out + regere to lead straight. See Right, and cf. Alert.]
   1. Upright, or having a vertical position; not inverted; not
      leaning or bent; not prone; as, to stand erect.
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            Two of far nobler shape, erect and tall. --Milton.
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            Among the Greek colonies and churches of Asia,
            Philadelphia is still erect -- a column of ruins.
                                                  --Gibbon.
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   2. Directed upward; raised; uplifted.
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            His piercing eyes, erect, appear to view
            Superior worlds, and look all nature through.
                                                  --Pope.
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   3. Bold; confident; free from depression; undismayed.
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            But who is he, by years
            Bowed, but erect in heart?            --Keble.
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   4. Watchful; alert.
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            Vigilant and erect attention of mind. --Hooker.
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   5. (Bot.) Standing upright, with reference to the earth's
      surface, or to the surface to which it is attached.
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   6. (Her.) Elevated, as the tips of wings, heads of serpents,
      etc.
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The Collaborative International Dictionary of English v.0.48:

Erect \E*rect"\, v. i.
   To rise upright. [Obs.]
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         By wet, stalks do erect.                 --Bacon.
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The Collaborative International Dictionary of English v.0.48:

Erect \E*rect"\, v. t. [imp. & p. p. Erected; p. pr. & vb. n.
   Erecting.]
   1. To raise and place in an upright or perpendicular
      position; to set upright; to raise; as, to erect a pole, a
      flagstaff, a monument, etc.
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   2. To raise, as a building; to build; to construct; as, to
      erect a house or a fort; to set up; to put together the
      component parts of, as of a machine.
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   3. To lift up; to elevate; to exalt; to magnify.
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            That didst his state above his hopes erect.
                                                  --Daniel.
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            I, who am a party, am not to erect myself into a
            judge.                                --Dryden.
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   4. To animate; to encourage; to cheer.
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            It raiseth the dropping spirit, erecting it to a
            loving complaisance.                  --Barrow.
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   5. To set up as an assertion or consequence from premises, or
      the like. "To erect conclusions." --Sir T. Browne.
      "Malebranche erects this proposition." --Locke.
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   6. To set up or establish; to found; to form; to institute.
      "To erect a new commonwealth." --Hooker.
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   Erecting shop (Mach.), a place where large machines, as
      engines, are put together and adjusted.

   Syn: To set up; raise; elevate; construct; build; institute;
        establish; found.
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WordNet (r) 3.0 (2006):

erect
    adj 1: upright in position or posture; "an erect stature";
           "erect flower stalks"; "for a dog, an erect tail
           indicates aggression"; "a column still vertical amid the
           ruins"; "he sat bolt upright" [syn: erect, vertical,
           upright] [ant: unerect]
    2: of sexual organs; stiff and rigid [syn: tumid, erect]
    v 1: construct, build, or erect; "Raise a barn" [syn: raise,
         erect, rear, set up, put up] [ant: dismantle,
         level, pull down, rase, raze, take down, tear
         down]
    2: cause to rise up [syn: rear, erect]

Moby Thesaurus II by Grady Ward, 1.0:

196 Moby Thesaurus words for "erect":
   Christian, aggrandize, assemble, blameless, bolt upright, boost,
   build, buoy up, cast, cast up, clean, compose, compound, concoct,
   construct, create, creditable, decent, devise, dignify,
   distinguish, downright, elaborate, elevate, elevated, ennoble,
   erectile, escalate, establish, estimable, ethical, evolve, exalted,
   extrude, fabricate, fair, fashion, forge, form, formulate, found,
   frame, fudge together, full of integrity, get up, glorify, good,
   heave, heft, heighten, heist, high, high-minded, high-principled,
   highly respectable, hike, hoick, hoist, hold up, honest, honor,
   honorable, house-proud, immaculate, independent, indite, institute,
   inviolate, irreproachable, jerk up, just, knock up, law-abiding,
   law-loving, law-revering, levitate, lift, lift up, lifted, lob,
   loft, lofty, magnify, make, make up, manly, manufacture, mature,
   mold, moral, noble, on stilts, organize, patch together, perk up,
   perpendicular, piece together, pitch, plumb, prefabricate, prepare,
   prideful, principled, produce, proud, proud as Lucifer,
   proud-blooded, proud-looking, proud-minded, proud-spirited,
   proudful, proudhearted, pure, purse-proud, put together, put up,
   raise, raise aloft, raise up, raised, rampant, rear, rear aloft,
   rear up, rearing, remove, reputable, respectable, right,
   right-minded, righteous, rise, run up, self-confident,
   self-esteeming, self-reliant, self-respecting, self-sufficient,
   set up, shape, sky, spotless, stainless, stand upright, stand-up,
   standing, standing up, sterling, stick up, stiff-necked, stilted,
   straight, straight-up, sublime, throw up, true-dealing,
   true-devoted, true-disposing, true-souled, true-spirited,
   truehearted, unblemished, uncorrupt, uncorrupted, undefiled,
   unimpeachable, unspotted, unstained, unsullied, untarnished, up,
   upbuoy, upcast, upend, upended, upflung, upheave, uphoist, uphold,
   uplift, uplifted, upraise, upraised, uprear, upreared, upright,
   uprighteous, upstanding, upthrow, upthrown, vertical, virtuous,
   whomp up, worthy, write, yeomanly