An annuity, with the benefit of survivorship, or a loan
   raised on life annuities with the benefit of survivorship. Thus, an
   annuity is shared among a number, on the principle that the share of
   each, at his death, is enjoyed by the survivors, until at last the
   whole goes to the last survivor, or to the last two or three, according
   to the terms on which the money is advanced. Used also adjectively; as,
   tontine insurance.