Definition of Soundex in English:

Soundex

noun

Computing
  • [mass noun] A phonetic coding system intended to suppress spelling variations, used especially to encode surnames for the linkage of medical and other records:

    [as modifier] ‘Soundex searches’

Origin

1950s: from sound + the arbitrary ending -ex.

Pronunciation:

Soundex

/ˈsaʊndɛks/