Definition
RELATION carries three distinct legal meanings, each operating in a different domain:
1. Kinship or family connection. A person connected to another by blood (consanguinity) or marriage (affinity). In this sense, "relation" is a synonym for relative or kinsman. Statutes governing inheritance, benefits, disqualification of witnesses, and conflicts of interest frequently use "relation" or "relations" in this sense.
2. Legal status between persons. The situation or connection between two parties who occupy formally recognized roles with respect to each other — whether created by law, contract, or family status. Examples include the relation of guardian and ward, husband and wife, master and servant, and parent and child. "Domestic relations" as a field of law takes its name from this meaning.
3. The doctrine of relation back. A legal fiction by which an act performed at one time is treated, for certain purposes, as having been performed at an earlier time. When multiple steps are required to complete a legal transaction, the final step that consummates the transaction may be deemed to take effect as of the date the first step was taken. This doctrine prevents gaps in legal title, authority, or rights that would otherwise occur because of the sequential nature of formal legal proceedings.
Of these three, the doctrine of relation back (meaning 3) is the most technically significant in legal research and the one most likely to be overlooked by researchers who encounter the term without context.
Common Language
Modern common usage (Wiktionary): The manner in which two things may be associated; a member of one's extended family; the act of relating a story; in mathematics and computing, a set of ordered tuples or pairs.
Historical common usage (Webster's 1913): The act of relating or telling; also, that which is related; a recital, account, or narration; the state of being related or of referring; relative quality or condition.
The gap matters. In ordinary English, "relation" most naturally points toward either a family member or a general connection between things. Legal usage adopts both of these meanings but adds a third — the doctrine of relation back — that has no counterpart in everyday speech. A researcher encountering "relation" in an older legal document must determine from context whether the author means a person, a legal status, or a temporal fiction before interpreting what follows.
Common Confusion
The doctrine of relation back (meaning 3) is sometimes confused with retroactivity or nunc pro tunc orders, but these are distinct. Retroactivity generally refers to statutes or rules applied to events that preceded their enactment — a legislative or constitutional question. Nunc pro tunc is a court order correcting the record to reflect what should have been entered at an earlier time. Relation back, by contrast, is a legal fiction applied to completed private transactions or proceedings — such as deed delivery or letters of administration — to fix the operative date for purposes of title or authority. The three concepts overlap in effect but differ in origin, mechanism, and applicable law.
Recognized Forms
/SUBTYPES
The doctrine of relation back appears in several distinct procedural and substantive contexts:
Conveyancing. A deed delivered in escrow and later delivered as a completed deed may, for certain purposes, relate back to the date of the original deposit. This prevents the grantor's death or incapacity during the escrow period from defeating the conveyance.
Administration of estates. Letters of administration, once granted, may relate back to the date of the intestate's death. This allows the administrator to recover assets and enforce claims that arose in the interval between death and the formal grant of authority.
Amended pleadings. In modern civil procedure, an amended pleading that adds a claim or party may relate back to the date of the original pleading for statute of limitations purposes, provided specified conditions are met.
Agency and ratification. When a principal ratifies an act previously performed without authority by a purported agent, the ratification may relate back to the time of the original act.
Why It Matters in Research
The term "relation" is a structural trap in historical legal sources. In older treatises, opinions, and conveyancing manuals, the word appears without disambiguation — the reader is expected to know from context which meaning applies. A passage discussing "the relation of master and servant" and a passage discussing "letters of administration taking effect by relation" are using the same word in entirely different technical senses.
Researchers working in property law, probate, and procedure should treat every instance of "relation" in historical sources as ambiguous until context resolves it. The doctrine of relation back is especially invisible in case indexes and digests, which may file the relevant material under "relation," "relation back," "escrow," "administration," or "ratification" depending on the digest's editorial choices — with no consistency across publishers or editions.
The kinship sense of "relation" creates its own research hazard in statutes. Nineteenth-century legislation frequently restricts rights or imposes duties on "relations" without defining the term's scope. Whether "relations" includes relatives by affinity as well as consanguinity, and how far removed a relative must be to qualify, varies by jurisdiction and period. Courts construed these terms inconsistently, and the answer often turns on the specific statutory purpose rather than any general rule.
In modern civil procedure, the relation-back doctrine for amended pleadings is a live research area with significant jurisdictional variation. Federal Rule of Civil Procedure 15(c) codifies the doctrine for federal courts, but state procedural rules differ, and the interplay between federal relation-back rules and state statutes of limitations in diversity cases has generated substantial litigation.
Historical Dictionary Support
The historical dictionaries are in agreement on the core structure but differ in emphasis. Black's Law Dictionary presents all three meanings in sequence, treating them as coordinate definitions of a single term — a reasonable organizational choice, but one that can cause researchers to underweight the doctrine of relation back by burying it after the more intuitive kinship and status meanings.
Burrill's Law Dictionary gives the sharpest technical account of the doctrine, tracing the Latin root (relatio, from referre, to carry back) and emphasizing that the doctrine gives an act "operation or validity" from a past date — a formulation that captures the legal fiction's functional purpose more precisely than Black's neutral language. Burrill's example of letters of administration (taking effect by relation from the death of the intestate, citing Williams on Executors) is the clearest illustration in any of the shelf sources.
Anderson's Dictionary of Law takes an applied approach, focusing on conveyancing: when several proceedings are essential to complete a transaction, the last proceeding is held to take effect as of the date of the first. This is useful for property researchers but understates the doctrine's reach into probate and procedure.
None of the historical dictionaries adequately addresses the relation-back doctrine as it applies to amended pleadings — a modern procedural development that postdates the core shelf sources. Researchers working in civil procedure must consult contemporary sources for that dimension of the term.
Jurisdictional Note
The doctrine of relation back in amended pleadings is codified in federal practice under Fed. R. Civ. P. 15(c) but varies significantly across state procedural systems. In diversity cases, courts must determine whether federal or state relation-back rules govern for statute of limitations purposes — a question that remains unsettled in some circuits. The kinship sense of "relation" also varies: community property states and common law states may define qualifying family connections differently in the context of inheritance, disqualification statutes, and benefits law.
Encyclopedia Cross-Reference
Related Party Transactions (The Law Mind Tax Encyclopedia) — relevant to the legal-status meaning of relation in the tax context, where transactions between related parties receive heightened scrutiny.
Public Sector Labor Relations (The Law Mind Employment & Labor Law Encyclopedia) — relevant to the legal-status and regulatory meaning of "relations" in the labor law context.