Definition of tontine in English:
 tontine
noun ˈtɒntiːntɒnˈtiːnˈtɑntin
1An annuity shared by subscribers to a loan or common fund, the shares increasing as subscribers die until the last survivor enjoys the whole income.
 Example sentencesExamples
-  Here one finds the treatment of joint annuities on several lives, the inheritance of annuities, problems about the fair division of the costs of a tontine, and other contracts in which both age and interest on capital are relevant.
 -  If you own a house with others in a tontine - so that on death your share goes automatically to the others - where do you stand with regard to inheritance tax?
 -  The later we leave it, the more the pension becomes a tontine in which the survivor takes all.
 -  Cash self-help groups function like tontines, which have been documented in other areas of West Africa.
 
- 1.1 A scheme for life assurance in which the beneficiaries are those who survive and maintain a policy to the end of a given period.
 
Origin
  
Mid 18th century: from French, named after Lorenzo Tonti (1630–95), a Neapolitan banker who started such a scheme to raise government loans in France (circa1653).