Definition of "predecease"

predecease

/ˌpɹiːdəˈsiːs/

noun
plural predeceases
1. The death of one person or thing before another.
  Quotations
  ‘Private: for the hands of J. G. Utterson alone and in case of his predecease to be destroyed unread,’ so it was emphatically superscribed; and the lawyer to behold the contents.
  1886 January 5, Robert Louis Stevenson, “Remarkable Incident of Doctor Lanyon”, in Strange Case of Dr Jekyll and Mr Hyde, London: Longmans, Green, and Co., pages 59–60
verb
third-person singular simple present predeceases, present participle predeceasing, simple past and past participle predeceased
1. (transitive) To die sooner than.
  Quotations
  If children prædeceaſe progenitours, / VVe are their ofſpring and they none of ours.
  1594, William Shakespeare, Lucrece (First Quarto)‎, London: […] Richard Field, for Iohn Harrison, […]