The Collaborative International Dictionary of English v.0.48:

Fraud \Fraud\ (fr[add]d), n. [F. fraude, L. fraus, fraudis;
   prob. akin to Skr. dh[=u]rv to injure, dhv[.r] to cause to
   fall, and E. dull.]
   1. Deception deliberately practiced with a view to gaining an
      unlawful or unfair advantage; artifice by which the right
      or interest of another is injured; injurious stratagem;
      deceit; trick.
      [1913 Webster]

            If success a lover's toil attends,
            Few ask, if fraud or force attained his ends.
                                                  --Pope.
      [1913 Webster]

   2. (Law) An intentional perversion of truth for the purpose
      of obtaining some valuable thing or promise from another.
      [1913 Webster]

   3. A trap or snare. [Obs.]
      [1913 Webster]

            To draw the proud King Ahab into fraud. --Milton.
      [1913 Webster]

   Constructive fraud (Law), an act, statement, or omission
      which operates as a fraud, although perhaps not intended
      to be such. --Mozley & W.

   Pious fraud (Ch. Hist.), a fraud contrived and executed to
      benefit the church or accomplish some good end, upon the
      theory that the end justified the means.

   Statute of frauds (Law), an English statute (1676), the
      principle of which is incorporated in the legislation of
      all the States of this country, by which writing with
      specific solemnities (varying in the several statutes) is
      required to give efficacy to certain dispositions of
      property. --Wharton.

   Syn: Deception; deceit; guile; craft; wile; sham; strife;
        circumvention; stratagem; trick; imposition; cheat. See
        Deception.
        [1913 Webster]

WordNet (r) 3.0 (2006):

constructive fraud
    n 1: comprises all acts or omissions or concealments involving
         breach of equitable or legal duty or trust or confidence
         [syn: constructive fraud, legal fraud]