Definition of idem sonans in US English:

idem sonans

adjective

Law
  • Homophonous (with).

noun

Law
  • An identity of sound in the pronunciation of words or names; the occurrence in a document of a material word or name misspelt but having the sound of the word or name intended; the principle that the intended word or name is understood in such circumstances.

Origin

Early 19th century. From classical Latin īdem the same + sonāns sonant.