Definition of predecease in US English:

predecease

verb

[with object]formal
  • Die before (another person, typically someone related by blood or marriage)

    ‘his second wife predeceased him’
    • ‘Few people apart from experts in the field have any inkling that Nietzsche predeceased his sister by some 35 years.’
    • ‘They had a family of five daughters and one son John, the latter who sadly predeceased his father.’
    • ‘Dad was predeceased by his beloved wife Tena, six brothers and four sisters.’
    • ‘The two men ended up in a bitter dispute, and Henry the Young King predeceased his father.’
    • ‘In 1376 he predeceased his father, leaving his young son Richard as heir to the throne.’

Pronunciation

predecease

/ˌprēdəˈsēs//ˌpridəˈsis/