Definition
Prepense means forethought, preconception, or premeditation — the mental state of having deliberated or planned in advance of an act. In legal usage, prepense is almost never encountered alone. It operates as a modifier, most characteristically in the compound phrase malice prepense (also rendered malice aforethought), which is the foundational mental element of murder at common law. The word signals that the relevant mental state — typically malice — was formed before, not during or after, the act in question.
Common Language
Modern common usage (Wiktionary): To weigh or consider beforehand; to intend. To deliberate beforehand.
Historical common usage (Webster's 1913): To weigh or consider beforehand; to premeditate. Marked as obsolete; attributed to Spenser and Sir Thomas Elyot.
Webster's own "obsolete" label tells the story. By the time American legal dictionaries were codifying the term, prepense had already dropped out of living English. Its legal survival is entirely parasitic on the fixed phrase malice prepense. A researcher encountering the standalone word in a modern context should treat it as a deliberate archaism or a direct quotation from historical legal materials.
Common Confusion
Prepense and aforethought are functional synonyms in legal usage and are used interchangeably across historical sources. Bouvier equates prepense directly with aforethought; Burrill glosses it as "before-thought" and redirects to malice aforethought. The confusion worth noting is not between these two terms — they mean the same thing — but between prepense as a standalone word and malice prepense as a term of art. Prepense alone carries only a generic sense of prior deliberation; malice prepense is the specific compound that carries legal weight, particularly in homicide law. Treating prepense as independently operative, divorced from malice, risks misreading historical indictments and pleadings.
Why It Matters in Research
Researchers will almost never encounter prepense outside the phrase malice prepense, but understanding the term matters in several specific contexts:
Historical indictments and criminal pleadings. Common law murder indictments were formulaic. The phrase "of his malice aforethought" (or its Law French equivalent, malice prepense) was a required term of art. Its presence or absence in a historical charging document could determine whether the charge was murder or manslaughter. When reading digitized or transcribed historical records, variant spellings — prepensed, prepense, purpensed (the form Burrill notes from Leges Gulielmi Conquestoris) — may appear. Treat these as equivalent.
The Law French layer. Prepense is a Law French survival, not a Latin one. Burrill's note that the related form purpensed appears in the Leges Gulielmi Conquestoris signals that this vocabulary is very old and that its earliest legal appearances will be in Norman French legal texts, not in Latin or Middle English. Researchers working in early English legal records need this context to recognize the term in its various orthographic guises.
The shift to "aforethought." As Law French receded, malice prepense was increasingly replaced by malice aforethought in English-language pleading. By the nineteenth century, American jurisdictions had largely completed this transition. Finding malice prepense in an American source after roughly 1850 is unusual and may indicate either quotation from an earlier authority or a jurisdiction that retained archaic pleading forms longer than most.
Corpus navigation. In the Law Mind corpus, prepense will appear most densely in materials treating homicide, murder, and the common law of crimes. Cross-referencing entries on malice aforethought, malice, and murder will be essential. The term does not appear in civil law contexts with any frequency.
Historical Dictionary Support
The six historical sources show near-total agreement on meaning and unanimous convergence on usage. All define prepense as some variant of forethought or premeditation; all treat it as meaningful only in relation to malice. The variation lies in emphasis and derivation.
Black's (both editions) gives the most compact treatment: "forethought; preconceived; premeditated." The second edition's case citations — Territory v. Bannigan and People v. Clark — confirm that the term's legal work was done almost entirely in homicide prosecutions.
Rapalje & Lawrence add "contrived beforehand" and redirect to their MALICE entry, which is the correct analytical move. The term cannot be fully understood in isolation.
Anderson is the most direct: "aforethought; premeditated: as, malice prepense." The "as" construction makes clear that malice prepense is the operative legal form, and prepense alone is merely definitional.
Bouvier, characteristically, gives the one-word gloss "aforethought" and cites Chitty's Criminal Law — a signal that the term's practical significance lies in pleading and indictment draftsmanship.
Burrill is the most historically informative. His derivation from Law French ("before-thought"), his citation to the Leges Gulielmi Conquestoris, and his note of the variant purpensed give researchers the deepest linguistic and chronological grounding available in any of these sources.
What the historical dictionaries collectively underemphasize is the term's obsolescence trajectory. None flags that prepense had essentially ceased to function as a standalone legal word by the time these dictionaries were compiled. A researcher relying only on these entries might not appreciate how thoroughly the term had been absorbed into — and made inseparable from — the compound malice prepense.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Malice Aforethought; Murder (Common Law Elements)