What is Lex Fori?

Legal Definition
Lex fori (Latin for the laws of a forum) is a legal term used in the conflict of laws used to refer to the laws of the jurisdiction in which a legal action is brought. When a court decides that it should, by reason of the principles of conflict of law, resolve a given legal dispute by reference to the laws of another jurisdiction, the lex causae, the lex fori still govern procedural matters.
-- Wikipedia
Legal Definition
Practice. The law of the court or forum.

2. The forms of remedies, the modes of proceeding, and the execution of judgments, are to be regulated solely and exclusively, by the laws of the place where the action is instituted or as the civilians uniformly express it, according to the lex fori. Story, Confl. of Laws, ยง550; 1 Caines' Rep. 402; 3 Johns. Ch. R. 190; 5 Johns. R. 132; 2 Mass. R. 84; 7 Mass. R. 515; 3 Conn. R. 472; 7 M. R. 214; 1 Bouv. Inst. n. 860.
-- Bouviers Law Dictionary
Legal Definition
The law of the forum, or court: that is, the positive law of the state, country, or jurisdiction of whose judicial system the court where the suit is brought or remedy sought is an integral part. "Remedies upon contracts and their incidents are regulated and pursued according to the law of the place where the action is instituted, and the lex loci has no application." 2 Kent, Comm. 462. "The remedies are to be governed by the laws of the country where the suit is brought; or, as it is compendiously expressed, by the lex fori." Bank of United States v. Don-nally, 8 Pet. 361, 372, 8 L. Ed. 974. "So far as the law affects the remedy, the lex fori, the law of the place where that remedy is sought, must govern. But, so far as the law of the construction, the legal operation and effect, of the contract, is concerned, it is governed by the law of the place where the contract is made." Warren v. Co.pelin, 4 Mete. (Mass.) 594, 507. See Lex Loci Contractus.
-- Black's Law Dictionary
Legal Definition
The law of the jurisdiction of the court. See 112 U. S. 452, 28 L. Ed. 751, 5 Sup. Ct. Rep. 221.
-- Ballentine's Law Dictionary