Bouvier's Law Dictionary, Sixth Edition, 1856:

FRAUD, contracts, torts. Any trick or artifice employed by one person to  induce another to fall into an error, or to detain him in it, so that he may  make an agreement contrary to his interest. The fraud may consist either,  first, in the misrepresentation, or, secondly, in the concealment of a  material fact. Fraud, force and vexation, are odious in law. Booth, Real  Actions, 250. Fraud gives no action, however, without damage; 3 T. R. 56;  and in matters of contract it is merely a defence; it cannot in any case constitute a new contract. 7 Vez. 211; 2 Miles' Rep. 229. It is essentially ad hominem. 4 T. R. 337-8. 

2. Fraud avoids a contract, ab initio, both at law and in equity,  whether the object be to deceive the public, or third persons, or one party  endeavor thereby to cheat the other. 1 Fonb. Tr. Equity, 3d ed. 66, note;  6th ed. 122, and notes; Newl. Cont. 352; 1 Bl. R. 465; Dougl. Rep. 450; 3  Burr. Rep. 1909; 3 V. & B. Rep. 42; 3 Chit. Com. Law, 155, 806, 698; 1 Sch.  & Lef. 209; Verpl. Contracts, passim; Domat, Lois Civ. p. 1, 1. 4, t. 6, s.  8, n. 2.

3. The following enumeration of frauds, for which equity will grant  relief, is given by Lord Hardwicke, 2 Ves. 155. 1. Fraud, dolus malus, may  be actual, arising from facts and circumstances of imposition, which is the  plainest case. 2. It may be apparent from the intrinsic nature and subject  of the bargain itself; such as no man in his senses, and not under delusion,  would make on the one hand, and such as no honest and fair man would accept  on the other, which are inequitable and unconscientious bargains. 1 Lev. R.  111. 3. Fraud, which may be presumed from the circumstances and condition of  the parties contracting. 4. Fraud, which may be collected and inferred in  the consideration of a court of equity, from the nature and circumstances of  the transaction, as being an imposition and deceit on other persons, not  parties to the fraudulent agreement. 5. Fraud, in what are called catching  bargains, (q.v.) with heirs, reversioners) or expectants on the life of the  parents. This last seems to fall, naturally, under one or more of the  preceding divisions.

4. Frauds may be also divided into actual or positive and constructive  frauds.

5. An actual or positive fraud is the intentional and successful  employment of any cunning, deception, or artifice, used to circumvent,
cheat, or deceive another. 1 Story, Eq. Jur. Sec. 186; Dig. 4, 3, 1, 2; Id.  2, 14, 7, 9.

6. By constructive fraud is meant such a contract or act, which, though  not originating in any actual evil design or contrivance to perpetrate a  positive fraud or injury upon other persons, yet, by its tendency to deceive  or mislead. them, or to violate private or public confidence, or to impair  or injure the public interests, is deemed equally reprehensible with  positive fraud, and, therefore, is prohibited by law, as within the same  reason and mischief as contracts and acts done malo animo. Constructive  frauds are such as are either against public policy, in violation of some  special confidence or trust, or operate substantially as a fraud upon  private right's, interests, duties, or intentions of third persons; or  unconscientiously compromit, or injuriously affect, the private interests,  rights or duties of the parties themselves. 1 Story, Eq. ch. 7, Sec. 258 to  440.

7. The civilians divide frauds into positive, which consists in doing  one's self, or causing another to do, such things as induce a belief of the  truth of what does not exist or negative, which consists in doing or  dissimulating certain things, in order to induce the opposite party. into  error, or to retain him there. The intention to deceive, which is the  characteristic of fraud, is here present. Fraud is also divided into that  which has induced the contract, dolus dans causum contractui, and incidental  or accidental fraud. The former is that which has been the cause or  determining motive of the contract, that without which the party defrauded  would not have contracted, when the artifices practised by one of the  parties have been such that it is evident, without them, the other would not  have contracted. Incidental or accidental fraud is that by which a person,  otherwise determined to contract, is deceived on some accessories or  incidents of the contract; for example, as to the quality of the object of  the contract, or its price, so that he has made a bad bargain. Accidental  fraud does not, according to the civilians, avoid the contract, but simply  subjects the party to damages. It is otherwise where the fraud has been the  determining cause of the contract, qui causam dedit contractui; in that  case. the contract is void. Toull. Dr. Civ. Fr. Liv. 3, t. 3, c. 2, n. Sec.  5, n. 86, et seq. See also 1 Malleville, Analyse de la, Discussion de Code  Civil, pp. 15, 16; Bouv. Inst. Index, h.t. Vide Catching bargain; Lesion;  Voluntary Conveyance.

FRAUDS, STATUTE OF. The name commonly given to the statute 29 Car. II., c.  3, entitled "An act for prevention of frauds and perjuries." This statute  has been re-enacted in most. of the states of the Union, generally with  omissions, amendments, or alterations. When the words of the statute have  been used, the construction put upon them has also been adopted. Most of the  acts of the different states will be found in Anthon's Appendix to Shep.  Touchst. See also the Appendix to the second edition of Roberts on Frauds.

[Bouvier's Law Dictionary, Sixth Edition, 1856:]

National Information Infrastructure Protection Act of 1995

United States Code, Title 18, Part I, Chapter 47: Fraud and False Statements

18 U.S.C. 1030: Fraud and Related Activity in connection with computers

[NOTE:  This section is also called the Computer Fraud and Abuse Act of 1986]

McNally v. United States, 483 U.S. 350 (1987)

Fraud in its elementary common law sense of deceit -- and this is one of the meanings that fraud bears [483 U.S. 372] in the statute, see United States v. Dial, 757 F.2d 163, 168 (7th Cir.1985) -- includes the deliberate concealment of material information in a setting of fiduciary obligation. A public official is a fiduciary toward the public, including, in the case of a judge, the litigants who appear before him, and if he deliberately conceals material information from them, he is guilty of fraud. When a judge is busily soliciting loans from counsel to one party, and not telling the opposing counsel (let alone the public), he is concealing material information in violation of his fiduciary obligations.

* * * *

Second, the systematic and long-continued receipt of bribes by a public official, coupled with active efforts to conceal the bribe-taking from the public and the authorities . . . is fraud (again in its elementary sense of deceit, and quite possibly in other senses as well), even if it is the public, rather than counsel, that is being kept in the dark. It is irrelevant that, so far as appears, Holzer never ruled differently in a case because of a lawyer's willingness or unwillingness to make him a loan, so that his conduct caused no demonstrable loss either to a litigant or to the public at large. See, e.g., United States v. Keane, 622 F.2d 534, 541, 546 (7th Cir.1975); United States v. Lovett, 811 F.2d 979, 985 (7th Cir.1987); United States v. Manton, 107 F.2d 834, 846 (2d Cir.1939). How can anyone prove how a judge would have ruled if he had not been bribed?

[McNally v. United States, 483 U.S. 350 (1987)]