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.]
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   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.
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   2. To put on. [Obs.]
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            Can not find one this girdle to invest. --Spenser.
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   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.
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            I do invest you jointly with my power. --Shak.
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   4. To surround, accompany, or attend.
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            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.
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   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.
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   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]