mens rea

/ˌmɛnz ˈɹiːə/

noun

A reactive mind, a conscious knowing by the individual that an act was committed, either by oneself or by another.

Meanings

nounmens rea (plural mentes reae)

plural mentes reae

  1. generalhuman sciencesA reactive mind, a conscious knowing by the individual that an act was committed, either by oneself or by another.
  2. lawA guilty mind, the conscious knowing of a perpetrator while committing an act that the act is illicit.

    The individual mentes reae of the joint perpetrators have to be considered separately.

    2016, Dennis J. Baker, Reinterpreting Criminal Complicity and Inchoate Participation Offences, page 174
    4 more examples

    As a general rule the act (or omission) causing death and the relevant mens rea must occur at the same time. The most obvious application of this rule to exclude liability is the case where the mens rea is formed after the actus reus has taken place.

    2006, David Lanham, David Wood, Bronwyn Bartal, Rob Evans, Criminal Laws in Australia, page 198

    The criminal offences not requiring a mens rea proof for convictions are then specifically indicated in the legislature as being under “strict liability.”

    2007, Nikolaj Nottelmann, Blameworthy Belief: A Study in Epistemic Deontologism, page 10

    The majority of serious criminal offences require, in addition to the actus reus, a specific state of mind on the part of the accused, usually referred to as the mens rea. Many less serious crimes require no mens rea, but simply proof that the defendant caused the prohibited harm.

    2011, Jonathan Herring, Criminal Law, 7th edition, page 67

    In “Winner,” [Susanna] Fogel dramatizes, onscreen, Reality [Winner]’s mens rea, showing the elaborate details of her plan to print, purloin, and disclose the relevant pages of the Russia file—and the combination of forethought and improvisation on which the plan’s success depends.

    2024 September 11, Richard Brody, ““Winner” Takes Political Comedy Seriously”, in The New Yorker

Synonyms & antonyms

noun(law) criminal intent; the thoughts and intentions behind a wrongful act (including knowledge that the act is illegal); often at issue in murder trials

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Latinmēns
  2. Englishmens rea

From Latin mēns + reus (literally “guilty mind”), from the English common law precept Actus non facit reum nisi mens rea sit ("The act does not make a person guilty unless the mind is also guilty").

Full word history & related roots →

Translations

Chinese Mandarin 犯罪意圖 /犯罪意图, 犯罪故意
  • 犯罪意圖 /犯罪意图 (fànzuì yìtú)guilty mind
  • 犯罪故意 (fànzuì gùyì)guilty mind
  • 犯罪心理 (fànzuì xīnlǐ)guilty mind
Finnish tahallisuus
  • tahallisuusguilty mind
French mens rea
  • mens reaguilty mind
Hindi चोर की दाढ़ी में तिनका
  • चोर की दाढ़ी में तिनका (cor kī dāṛhī mẽ tinkā)guilty mind
Icelandic brotavilji, vilji til brots
  • brotaviljiguilty mind
  • vilji til brotsguilty mind
Japanese 故意
  • 故意 (koi)guilty mind
Russian престу́пный у́мысел
  • престу́пный у́мысел (prestúpnyj úmysel)guilty mind
Spanish mente rea
  • mente reaguilty mind

Rhymes & wordplay

Rhymes with mens rea

All rhymes →
Cite this entry
APA

mens rea. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/mens%20rea

MLA

“mens rea.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/mens%20rea. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “mens rea,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/mens%20rea.

Source: mens rea on Wiktionary, CC BY-SA 4.0.