Definition of lex talionis in English:

lex talionis

noun

mass noun
  • The law of retaliation, whereby a punishment resembles the offence committed in kind and degree.

    ‘the lex talionis of feud violence and blood money’
    • ‘This was indeed the purpose of the lex talionis.’
    • ‘He defends a strict application of the lex talionis (law of retribution) - that is, he holds to equality both in proportion and in kind of harm inflicted.’
    revenge, vengeance, reprisal, retribution, requital, recrimination, an eye for an eye, an eye for an eye and a tooth for a tooth, getting even, redress, repayment, payback
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Origin

Latin, from lex ‘law’ and talio(n-) ‘retaliation’ (from talis ‘such’).

Pronunciation

lex talionis

/lɛks ˌtalɪˈəʊnɪs/