Murder
unlawful killing of a human with malice aforethought
Murder is the unlawful killing of another human without justification or valid excuse and committed with the necessary intent as defined by the law in a specific jurisdiction. This state of mind may, depending upon the jurisdiction, distinguish murder from other forms of unlawful homicide, such as manslaughter. Manslaughter is killing committed in the absence of malice, such as in the case of voluntary manslaughter brought about by reasonable provocation, or diminished capacity. Involuntary manslaughter, where it is recognized, is a killing that lacks all but the most attenuated guilty intent, recklessness.
Most societies consider murder to be an extremely serious crime, and thus believe that a person convicted of murder should receive harsh punishments for the purposes of retribution, deterrence, rehabilitation, or incapacitation. In most countries, a person convicted of murder generally receives a long-term prison sentence, a life sentence, or capital punishment. Some countries, states, and territories, including the United Kingdom and other countries with English-derived common law, mandate life imprisonment for murder, whether it is subdivided into first-degree murder or otherwise.
Etymology
The modern English word "murder" descends from the Proto-Indo-European *mŕ̥-trom which meant "killing", a noun derived from *mer- "to die".
Proto-Germanic, in fact, had two nouns derived from this word, later merging into the modern English noun: *murþrą "death, killing, murder" (directly from Proto-Indo-European*mŕ̥-trom), whence Old English morðor "secret or unlawful killing of a person, murder; mortal sin, crime; punishment, torment, misery"; and *murþrijô "murderer; homicide" (from the verb *murþrijaną "to murder"), giving Old English myrþra "homicide, murder; murderer". There was a third word for "murder" in Proto-Germanic, continuing Proto-Indo-European *mr̥tós "dead" (compare Latin mors), giving Proto-Germanic *murþą "death, killing, murder" and Old English morþ "death, crime, murder" (compare German Mord).
Begin with the source’s own compact description: “Murder” is unlawful killing of a human with malice aforethought. The dossier treats that line as a proposition to test through Murder, unlawful and killing, not as a finished interpretation.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Sep 18, 2026. The linked authority identifier is Q132821.
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This entry incorporates text from “Murder” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.