The Collaborative International Dictionary of English v.0.48:

Trust \Trust\, n. [OE. trust, trost, Icel. traust confidence,
   security; akin to Dan. & Sw. tr["o]st comfort, consolation,
   G. trost, Goth. trausti a convention, covenant, and E. true.
   See True, and cf. Tryst.]
   1. Assured resting of the mind on the integrity, veracity,
      justice, friendship, or other sound principle, of another
      person; confidence; reliance; reliance. "O ever-failing
      trust in mortal strength!" --Milton.
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            Most take things upon trust.          --Locke.
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   2. Credit given; especially, delivery of property or
      merchandise in reliance upon future payment; exchange
      without immediate receipt of an equivalent; as, to sell or
      buy goods on trust.
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   3. Assured anticipation; dependence upon something future or
      contingent, as if present or actual; hope; belief. "Such
      trust have we through Christ." --2 Cor. iii. 4.
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            His trust was with the Eternal to be deemed
            Equal in strength.                    --Milton.
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   4. That which is committed or intrusted to one; something
      received in confidence; charge; deposit.
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   5. The condition or obligation of one to whom anything is
      confided; responsible charge or office.
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            [I] serve him truly that will put me in trust.
                                                  --Shak.
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            Reward them well, if they observe their trust.
                                                  --Denham.
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   6. That upon which confidence is reposed; ground of reliance;
      hope.
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            O Lord God, thou art my trust from my youth. --Ps.
                                                  lxxi. 5.
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   7. (Law) An estate devised or granted in confidence that the
      devisee or grantee shall convey it, or dispose of the
      profits, at the will, or for the benefit, of another; an
      estate held for the use of another; a confidence
      respecting property reposed in one person, who is termed
      the trustee, for the benefit of another, who is called the
      cestui que trust.
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   8. An equitable right or interest in property distinct from
      the legal ownership thereof; a use (as it existed before
      the Statute of Uses); also, a property interest held by
      one person for the benefit of another. Trusts are active,
      or special, express, implied, constructive, etc. In a

   passive trust the trustee simply has title to the trust
      property, while its control and management are in the
      beneficiary.
      [Webster 1913 Suppl.]

   9. A business organization or combination consisting of a
      number of firms or corporations operating, and often
      united, under an agreement creating a trust (in sense 1),
      esp. one formed mainly for the purpose of regulating the
      supply and price of commodities, etc.; often,
      opprobriously, a combination formed for the purpose of
      controlling or monopolizing a trade, industry, or
      business, by doing acts in restraint or trade; as, a sugar
      trust. A trust may take the form of a corporation or of a
      body of persons or corporations acting together by mutual
      arrangement, as under a contract or a so-called
      gentlemen's agreement. When it consists of corporations it
      may be effected by putting a majority of their stock
      either in the hands of a board of trustees (whence the
      name trust for the combination) or by transferring a
      majority to a holding company. The advantages of a trust
      are partly due to the economies made possible in carrying
      on a large business, as well as the doing away with
      competition. In the United States severe statutes against
      trusts have been passed by the Federal government and in
      many States, with elaborate statutory definitions.
      [Webster 1913 Suppl.]

   Syn: Confidence; belief; faith; hope; expectation.
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   Trust deed (Law), a deed conveying property to a trustee,
      for some specific use.
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WordNet (r) 3.0 (2006):

passive trust
    n 1: a trust in which the trustee performs no active duties
         [ant: active trust]