Definition
In law, "degree" carries two principal meanings that operate in largely separate doctrinal contexts.
1. Degree of relationship (consanguinity and affinity). A unit of measurement expressing how closely two persons are related by blood or marriage. Each generational step between two individuals counts as one degree. The concept governs inheritance, intestate succession, prohibited marriages, and disqualification rules (e.g., juror or witness competency). First-degree relatives are parents and children; second-degree includes grandparents and siblings; and so on outward through the family tree.
2. Degree of crime (criminal law). A legislative classification that divides a single criminal offense into tiers of severity based on the circumstances of its commission — the nature of the act, the identity or vulnerability of the victim, the presence of a weapon, premeditation, or other aggravating factors. The degree assigned determines the available punishment range. Murder in the first degree, for example, carries greater penalties than murder in the second degree, even though both offenses share the same underlying act.
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Common Language
Modern common usage (Wiktionary): Most prominently, an academic award conferred by a university or college upon completion of a course of study; also a unit of angular or temperature measurement; more generally, any stage or gradation in a scale.
Historical common usage (Webster's 1913): "One of a series of progressive steps upward or downward, in quality, rank, acquirement, and the like; a stage in progression; grade; gradation." Also: a person's rank or station in life.
The gap matters here. When a legal source from the eighteenth or nineteenth century uses "degree" in the context of family relations or succession, readers may instinctively reach for the academic or temperature-scale sense. More practically, the legal meaning of degree as a unit of relational distance is a technical measurement system, not a vague notion of grade or rank. Two people can be exactly two degrees apart; the calculation follows a defined methodology that varies, importantly, between the civil-law and common-law counting methods.
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Common Confusion
The civil-law method and the common-law (canon-law) method of counting degrees of kinship produce different results for the same relatives and are not interchangeable. Under the common-law method, each generational step up to the common ancestor and back down is counted separately. Under the civil-law method, only the steps on the longer side of the relationship are counted (or in some variants, the total steps are halved for direct-line calculations). Many American statutes historically specified which method applied; many did not. Researchers encountering intestacy disputes or prohibited-marriage cases must identify which counting system the jurisdiction adopted before the degree calculation is meaningful.
In criminal law, "degree" should not be confused with "class" or "category" of offense. Many modern penal codes classify crimes by letter class (Class A felony, Class B misdemeanor) rather than by degree. Some jurisdictions use both systems simultaneously for different offenses. The two frameworks are not equivalent.
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Recognized Forms
/SUBTYPES
Degrees of kinship: First degree, second degree, third degree, etc. — measured outward from the individual along lines of consanguinity or affinity.
Levitical degrees: The prohibited degrees of relationship enumerated in Leviticus 18, historically adopted as the basis for English ecclesiastical law on void and voidable marriages, and carried into early American law. Anderson's entry flags this explicitly.
Degrees of crime: First degree and second degree are the most common legislative divisions, though some jurisdictions add third degree and, for lesser offenses, fourth degree. The specific conduct that elevates an offense from one degree to the next is entirely a matter of statute and varies by jurisdiction and by crime.
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Why It Matters in Research
Researchers working in the Law Mind corpus will encounter "degree" across wildly different doctrinal contexts, and conflating the two primary meanings produces errors. An index hit on "degree" in a succession treatise means something entirely different from the same hit in a criminal law digest.
For consanguinity research: The counting method is the critical variable. Pre-twentieth-century American sources are often ambiguous about which method they apply, and the same relationship — say, first cousins — may be described as being in the fourth degree (common law) or the second degree (civil law), without explanation. Researchers tracing inheritance disputes or marriage prohibitions in historical sources must pin down the counting method before relying on any degree calculation. English ecclesiastical sources and Louisiana materials (civil-law tradition) will frequently diverge from the majority American common-law approach.
For criminal law research: The grading structure for any specific offense is entirely statutory, which means it changes whenever the legislature amends the code. Degree designations in nineteenth-century sources may not map onto modern degree designations for the same nominal offense. Homicide, assault, burglary, robbery, and arson have all undergone substantial reclassification in most jurisdictions over the past century and a half. An entry for "murder in the first degree" in an 1880 treatise may define the offense quite differently than the current statute using the same label. The Law Mind Encyclopedia entries on Battery, Robbery, and Burglary address the elements-and-degrees structure for those specific offenses.
The phrase "third degree" also appears in historical sources as slang for coercive interrogation — a usage entirely outside the doctrinal framework but common enough in legal journalism and trial records that researchers may encounter it without context.
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Historical Dictionary Support
All three source dictionaries agree on the two core meanings and use nearly identical language to express them. Black's (both editions) and Anderson's define degree in the consanguinity context as "a step or grade" measuring the "distance" or "removes" between related persons, and in the criminal context as a "division or classification" of a single crime into grades of guilt based on surrounding circumstances. The definitions are consistent and mutually reinforcing.
Anderson's adds a detail the Black's editions omit: the explicit identification of Levitical degrees as a recognized subcategory, noting their adoption in English and American law generally. This is a useful pointer for researchers working on historical marriage-prohibition or ecclesiastical jurisdiction questions.
None of the three dictionaries address the civil-law versus common-law counting-method problem, which is a meaningful gap. A researcher relying solely on these definitions would not know that the same term describes two different computational systems yielding different numerical results for the same relationship.
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Jurisdictional Note
Louisiana follows the civil-law method for counting degrees of kinship, consistent with its broader civil-law heritage, and will diverge from common-law-method states in how relationships are numerically expressed. In criminal law, the degree structure for any given offense is purely a product of state statute; some states (including New York and California) have elaborate multi-degree frameworks, while others use class-letter systems without degree designations at all. Federal criminal law generally uses the class-letter system rather than degrees.
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