Definition
Litere mortue (Latin: "dead letters") is a term of statutory construction referring to the bare, literal words of a statute when applied without reference to the statute's spirit, purpose, or animating intent. The concept captures the interpretive failure that results when a court or reader adheres rigidly to the text of a law while ignoring what the law was actually designed to accomplish. In this usage, the words become "dead" because they are severed from the purpose that gives them meaning and force.
The term is the counterpart to a purposive or equitable reading of a statute — the approach under which words are read in light of the mischief the legislature sought to remedy. Litere mortue represents the opposite pole: interpretation that treats statutory text as an end in itself rather than as a vehicle for legal policy.
Why It Matters in Research
This term appears almost exclusively in older treatises and digests on statutory interpretation. Researchers encountering it in historical legal materials should understand it as part of a well-developed early modern debate about the proper method of reading legislation — a debate that predates, but directly informs, the modern tension between textualism and purposivism.
The phrase surfaces in discussions of the "mischief rule" and equitable construction, doctrines prominent in English common law from Heydon's Case (1584) onward. When Bacon invokes litere mortue in his works, he is situating statutory interpretation within a broader argument that law derives its authority not from bare words but from reason and purpose. Researchers working on the history of statutory construction, natural law influences on English jurisprudence, or early Chancery practice will find this concept a useful connective thread.
A research trap: the term is rare in American legal sources and nearly absent from 19th-century American digests. Its primary currency is in English and Continental jurisprudence. Do not expect to find it applied directly in American case law; its relevance to American legal research is genealogical and theoretical rather than doctrinal.
Historical Dictionary Support
Bouvier's Law Dictionary defines litere mortue simply as "dead letters; fulfilling words of a statute," attributing the concept to Bacon's Works. The entry is characteristically spare — Bouvier records the phrase and its gloss without elaborating the interpretive theory behind it.
Bouvier's brevity here is a limitation. The entry captures what the phrase means literally but does not convey why the concept mattered. Bacon's use of the phrase is part of a sustained argument that purely literal adherence to statutory text produces injustice — that law animated only by its words and not its reason is, in a meaningful sense, dead law. The contrast Bacon draws is between words that live (because they serve their purpose) and words that are merely inert text.
No other major historical American legal dictionary — not Black's early editions, not Rapalje & Lawrence — appears to carry this entry. Its presence in Bouvier alone signals that the term was already receding from active legal usage by the mid-19th century, preserved more as a learned Latinisin than as a working term of practice.
Jurisdictional Note
The concept is rooted in English common law and civil law traditions. It has no formal doctrinal application in any American jurisdiction and should be treated as a term of legal theory and interpretive history rather than operative law.