The Collaborative International Dictionary of English v.0.48:

Invest \In*vest"\, v. t. [imp. & p. p. Invested; p. pr. & vb.
   n. Investing.] [L. investire, investitum; pref. in- in +
   vestire to clothe, fr. vestis clothing: cf. F. investir. See
   Vest.]
   [1913 Webster]
   1. To put garments on; to clothe; to dress; to array; --
      opposed to divest. Usually followed by with, sometimes
      by in; as, to invest one with a robe.
      [1913 Webster]

   2. To put on. [Obs.]
      [1913 Webster]

            Can not find one this girdle to invest. --Spenser.
      [1913 Webster]

   3. To clothe, as with office or authority; to place in
      possession of rank, dignity, or estate; to endow; to
      adorn; to grace; to bedeck; as, to invest with honor or
      glory; to invest with an estate.
      [1913 Webster]

            I do invest you jointly with my power. --Shak.
      [1913 Webster]

   4. To surround, accompany, or attend.
      [1913 Webster]

            Awe such as must always invest the spectacle of the
            guilt.                                --Hawthorne.
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   5. To confer; to give. [R.]
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            It investeth a right of government.   --Bacon.
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   6. (Mil.) To inclose; to surround or hem in with troops, so
      as to intercept reinforcements of men and provisions and
      prevent escape; to lay siege to; as, to invest a town.
      [1913 Webster]

   7. To lay out (money or capital) in business with the view of
      obtaining an income or profit; as, to invest money in bank
      stock.
      [1913 Webster]

   8. Hence: To expend (time, money, or other resources) with a
      view to obtaining some benefit of value in excess of that
      expended, or to achieve a useful pupose; as, to invest a
      lot of time in teaching one's children.
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Invest \In*vest"\, v. i.
   To make an investment; as, to invest in stocks; -- usually
   followed by in.
   [1913 Webster]

WordNet (r) 3.0 (2006):

invest
    v 1: make an investment; "Put money into bonds" [syn: invest,
         put, commit, place] [ant: disinvest, divest]
    2: give qualities or abilities to [syn: endow, indue,
       gift, empower, invest, endue]
    3: furnish with power or authority; of kings or emperors [syn:
       invest, clothe, adorn]
    4: provide with power and authority; "They vested the council
       with special rights" [syn: invest, vest, enthrone]
       [ant: disinvest, divest]
    5: place ceremoniously or formally in an office or position;
       "there was a ceremony to induct the president of the Academy"
       [syn: induct, invest, seat]

Moby Thesaurus II by Grady Ward, 1.0:

190 Moby Thesaurus words for "invest":
   accommodate, afford, allot, anoint, apparel, arm, array, attire,
   authorize, base, bedeck, bedrape, beleaguer, bequeath, beset,
   besiege, bless with, blockade, box, budget, build, build in,
   bundle up, buy in, buy into, case, chair, close, clothe,
   clothe with power, compass, compass about, consecrate, contribute,
   cost, cost out, crate, crown, deck, deputize, devote, dight,
   disburse, donate, dower, drape, dress, dud, embay, embosom, embox,
   embrace, empower, enable, encapsulate, encase, encircle, enclasp,
   enclose, enclothe, encompass, endow, endow with, endue, enfold,
   enlist, enrobe, enroll, enshroud, enthrone, envelop, environ,
   enwrap, establish, expend, favor with, fill, fill up, financier,
   find, fix, fork out, found, fund, furnish, garb, garment, give,
   go around, go round, go through, grace with, ground, habilitate,
   harass, harry, honor, imbue, inaugurate, incur costs, induct,
   ingrain, initiate, inoculate, install, instate, invest in, involve,
   keep, lap, lay out, lay out money, lay siege to,
   lay the foundation, leaven, maintain, make an investment,
   make available, make provision for, muffle up, open the purse,
   ordain, outlay, pack, package, pay, pay out, pitch, place,
   place in office, plant, plow back into, plunge, prepare, present,
   provide, provide for, put, put in, put out, put up, rag out,
   raiment, recruit, reinvest, replenish, risk, robe, run through,
   schedule, seat, set, set up, settle on, settle upon, sheathe,
   shell out, shroud, sign on, sign up, sink, sink money in, smother,
   soften up, speculate, spend, splurge, squander, steep, stock,
   store, subsidize, suffuse, supply, support, surround, swaddle,
   swathe, swear in, throne, throw money around, tire, veil, venture,
   vest, vest with, wrap, wrap about, wrap up, yield