In re

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In re, Latin for "in the matter [of]", is a term with several different, but related meanings.

In jurisprudence, in re: is used to indicate that a judicial proceeding may not have formally designated adverse parties or is otherwise uncontested. The term is commonly used in case citations of probate and bankruptcy proceedings, for example, In re Marriage Cases and General Motors Chapter 11 reorganization; it is also used in juvenile courts, as, for instance, In re Gault. The Bluebook describes In re as a "procedural phrase," and requires using it to abbreviate "in the matter of," "petition of," "application of," and similar expressions.[1]

In correspondence, the phrase in re: refers to the subject of a letter, memorandum, or electronic mail message. It is used especially in e-mail to denote in regard to; confusingly, RE: is employed to mean "in reply to:".

In philosophy, in re means "in reality", a statement about the real world as opposed to a statement about an ideal world – Plato's idea of philosopher kings, for example, has been criticized[by whom?] for being impossible to maintain in re.


  1. ^ "Case Names 10.2". Bluebook (19th ed.). Harvard Law Review. ISBN 9780615361161.