Definition
Law of the land is a constitutional phrase with two distinct but related meanings that have evolved unevenly over centuries:
1. Due process of law. In its primary constitutional sense, "law of the land" means the fundamental legal protections that every person is entitled to before the government may deprive them of life, liberty, or property. It refers not to any specific statute but to the general rules of law that govern society — rules that hear before condemning, that proceed by inquiry, and that render judgment only after trial. In this sense, the phrase is functionally equivalent to "due process of law" and traces directly to Chapter 29 of Magna Carta.
2. The supreme law within a jurisdiction. In a secondary, broader sense, "law of the land" refers to the body of law currently in force and recognized as authoritative within a given jurisdiction. The U.S. Constitution uses the phrase in this sense in Article VI, the Supremacy Clause, declaring the Constitution, federal laws made pursuant to it, and treaties to be "the supreme law of the land."
These two meanings operate independently. The first is a substantive and procedural guarantee against arbitrary government action. The second is a structural statement about legal hierarchy and the supremacy of certain sources of law over others.
Common Language
Modern common usage (Wiktionary): A particular law or the complete set of laws currently in effect within a jurisdiction, especially with emphasis on the official and authoritative nature of such law.
Historical common usage (Webster's 1913): The existing law of a country or state; particularly, the fundamental law expressed in constitutions and recognized as the supreme governing authority.
The common usage tracks the secondary (Supremacy Clause) meaning reasonably well, but it misses entirely the term's more technically precise constitutional function as a due process guarantee. A researcher encountering "law of the land" in a constitutional argument, a state court opinion, or a historical pleading is far more likely to be dealing with the due process meaning than with a simple reference to whatever law currently happens to be in force.
Common Confusion
"Law of the land" and "due process of law" are near-synonyms in constitutional law, but they are not interchangeable in all research contexts. Many state constitutions, particularly those predating the Fourteenth Amendment, use "law of the land" where federal constitutional practice would use "due process." Courts in those states developed "law of the land" doctrine independently, sometimes reaching different results than federal due process doctrine. Treating the two phrases as always equivalent can produce errors in reading both historical opinions and modern state constitutional cases.
The phrase is also sometimes confused with the colloquial "rule of law," which refers generally to the principle that law governs society rather than arbitrary power. "Rule of law" is a political and philosophical concept; "law of the land" in legal usage carries specific constitutional content.
Why It Matters in Research
Researchers face two distinct challenges with this term depending on which meaning is at issue.
For the due process meaning: The phrase appears throughout state constitutional provisions, many of which predate and do not incorporate the federal Due Process Clauses. Approximately half of U.S. states have "law of the land" clauses in their own constitutions. In those jurisdictions, courts have construed the phrase through their own independent lines of precedent. A researcher assuming that "law of the land" analysis in a state opinion tracks federal due process doctrine may miss significant divergence. Check the state's own constitutional history before assuming the federal framework applies.
For the Supremacy Clause meaning: When the phrase appears in a federal context — particularly in arguments about federal preemption, treaty obligations, or the constitutional status of federal law — it signals a structural hierarchy argument, not a procedural guarantee. These are distinct analytical frameworks, and conflating them produces category errors in legal argument and research.
In historical sources generally: The phrase is densely present in nineteenth-century state court opinions, constitutional conventions, and early treatises. It often appears without clear signal as to which meaning is intended. Context — particularly whether the court is discussing what law requires procedurally before the state can act against an individual, or what law overrides conflicting state or local rules — usually resolves the ambiguity, but the researcher must actively look for it.
Corpus trap: Because "law of the land" appears in ordinary speech as well as legal text, full-text searches across historical legal materials will return substantial noise. Filtering by context (Magna Carta references, due process arguments, state constitutional cases) is necessary to surface the technically significant uses.
Historical Dictionary Support
The three historical dictionaries reach the same essential conclusion through slightly different angles, and their synthesis is useful.
Bouvier and Black agree almost word for word that "law of the land" means "the general law which hears before it condemns, which proceeds upon inquiry, and renders judgment only after trial" — the formulation that every citizen's life, liberty, property, and immunities are held under the protection of general rules that govern society. Both treat the phrase as a near-synonym for "due process of law" and cross-reference accordingly.
Burrill adds the most historically valuable material. He provides the Latin origin (lex terrae), the Magna Carta reference (Chapter 29), and cites Coke's Institutes (2 Inst. 50) and Kent's Commentaries (2 Kent's Com. 13) — sources that anchor the phrase in its common law lineage. Crucially, Burrill also quotes Chief Justice Ruffin for the proposition that "the words 'law of the land' do not necessarily or exclusively signify an act of the legislature," which is a point the other dictionaries leave implicit. This is a significant caution: the phrase does not mean simply whatever the legislature has enacted. A statute that violates fundamental procedural guarantees does not thereby become the "law of the land" in this constitutional sense.
What all three historical dictionaries underemphasize is the Supremacy Clause usage. They focus almost entirely on the due process dimension — understandable given the period's dominant constitutional preoccupations — but researchers working in federal constitutional law should not treat these entries as complete accounts of the term's scope.
Jurisdictional Note
Jurisdictional variation here is substantive, not merely formal. Roughly half of state constitutions contain "law of the land" clauses that function as state-level due process guarantees, and state courts have developed these clauses through independent lines of reasoning. Some state courts have construed their "law of the land" provisions to provide broader protections than federal due process; others have tracked the federal standard. No uniform rule applies across jurisdictions.