Definition
Latin adjective and noun root meaning "bad," "evil," or "wrongful." In legal usage, mala appears almost exclusively as a prefix or modifier in compound Latin phrases rather than standing alone. As a feminine singular adjective (from malus), it modifies nouns like fides (faith) to produce mala fides (bad faith). As a neuter plural noun (from malum), it means "bad or evil things" — wrongs, offenses, or acts contrary to law or right. The term itself carries no independent operative legal force; its significance lies entirely in the compounds it anchors.
The two most important compounds in legal research are:
1. Mala in se (evils in themselves): Acts that are inherently wrongful by their own nature, independently of any statute — murder, rape, theft. The wrongfulness is intrinsic, recognized at common law without legislative declaration.
2. Mala prohibita (prohibited wrongs): Acts that are wrongful only because a statute declares them so. The act itself is not inherently immoral; it is wrong because the law says it is wrong — many regulatory offenses, traffic violations, and licensing requirements fall here.
Common Language
Modern common usage (Wiktionary): Plural of malum.
Historical common usage (Webster's 1913): "Evils; wrongs; offenses against right and law." Webster's 1913 specifically glosses mala in se and mala prohibita as legal terms of art, treating mala itself as functional only within those constructions.
The gap between common and legal usage is structural rather than semantic. In ordinary speech, mala does not appear as a standalone word in English at all. In legal sources, it appears constantly — but always as a building block. Researchers accustomed to reading Latin compounds may not recognize that mala in different compounds is grammatically distinct: the mala of mala fides is a feminine adjective modifying a feminine noun, while the mala of mala in se and mala prohibita is a neuter plural noun functioning as the subject. Historical legal dictionaries treat these as the same headword, which they are in origin, but the grammatical roles differ.
Common Confusion
The mala in se / mala prohibita distinction is the primary site of confusion in legal research. The categories are not airtight. Courts and commentators have long debated which offenses belong in which category, and the classification has practical consequences: it can affect whether mens rea is required, whether a defense of ignorance of law is available, and how a court interprets legislative intent. Researchers encountering the distinction in historical sources should not assume it maps cleanly onto modern statutory frameworks. Additionally, mala fides (bad faith) belongs to a grammatically and conceptually separate family of mala compounds and should not be conflated with the mala in se / mala prohibita taxonomy.
Recognized Forms
/SUBTYPES
Mala fides — bad faith; the antonym of bona fides. Appears in both substantive doctrine (good faith purchaser rules, contract law) and procedural contexts.
Mala fide possessor — one who holds property in bad faith, knowing the title is defective or the claim is unfounded. Relevant to property and restitution analysis in civil law traditions.
Mala in se — wrongs inherently evil; common law offenses recognized without statutory basis.
Mala prohibita — wrongs made so by statute; regulatory or legislative offenses.
Why It Matters in Research
Researchers in the Law Mind corpus will encounter mala primarily as a gateway to its compounds. Several navigational cautions apply.
First, indexing. Historical legal dictionaries index mala inconsistently. Black's 2nd Edition places derivative terms like mala fides under the mala headword. Bouvier's and Burrill's direct readers to malus or malum. Anderson's sends you to malus outright. A researcher looking for mala prohibita may need to check under M, under malum, under prohibita, or under the specific offense category — depending on the source and edition.
Second, the in se / prohibita distinction has evolved. Early common law used it to demarcate what required moral culpability from what did not. Modern criminal law scholarship has complicated this considerably, and some jurisdictions have largely abandoned the distinction in favor of statutory mens rea analysis. Historical sources will reflect the older, starker version of the divide. Do not assume that a 19th-century characterization of an offense as mala prohibita or mala in se maps onto current doctrine.
Third, mala fides compounds connect the criminal and civil sides of the corpus. Bad faith analysis appears in contract, tort, insurance, property, and procedural law. Researchers following a mala fides thread need to track it across doctrinal categories that are indexed separately in many encyclopedias and digests.
Fourth, in civil law jurisdictions and mixed legal systems, mala and its compounds carry weight in private law that they do not carry in common law. Comparative law materials in the corpus will use mala fides in particular with civilian precision.
Historical Dictionary Support
The historical dictionaries largely agree that mala means "bad" or "evil" and that its legal significance is compound-dependent. Black's 1st and 2nd editions, Bouvier's, and Burrill's all confirm this, though they differ in how much derivative material they include under the headword. Burrill's is the most grammatically precise, distinguishing between mala as a feminine singular adjective and mala as a neuter plural noun — a distinction the other dictionaries elide. Anderson's provides no independent entry, directing researchers to malus, which is technically correct but unhelpful to anyone searching alphabetically by the form they encountered in a text.
What the historical dictionaries largely omit is any serious treatment of the in se / prohibita distinction as a doctrinal problem rather than a definitional one. They present it as settled taxonomy. Modern legal scholarship treats it as contested and context-dependent. Researchers relying solely on historical dictionary glosses will get the definition but miss the analytical controversy.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Mala in Se and Mala Prohibita; Bad Faith (Mala Fides).