Definition of alter idem in English:

alter idem

noun

  • An alter ego; a second self; another of the same kind.

Origin

Early 17th century. From classical Latin alter īdem (Cicero) from alter another + īdem the same.

Pronunciation

alter idem

/ˌɒltə ˈɪdɛm//ˌɔːltə ˈʌɪdɛm//ˌɔːltə ˈɪdɛm/