DEMISE definition: 1. the death of a person: 2. the end of something that was previously considered to be powerful…. Learn more.

noun ; a · death ; b · a cessation of existence or activity ; c · a loss of position or status.

noun · death or decease. · termination of existence or operation: · Law. · Government. transfer of sovereignty, as by the death or deposition of the sovereign.

demise noun NAmE//dɪˈmaɪz// [singular] the end or failure of an institution, an idea, a company, etc.

demise · ​the end or failure of an institution, an idea, a company, etc. He praised the union's aims but predicted its early demise. the demise of the USSR.

(dɪmaɪz ) singular noun [usually with poss] The demise of something or someone is their end or death. [formal] Demise · Sudden demise · Hasten the demise of · Impending demise

There are four meanings listed in OED's entry for the noun demise, one of which is labelled obsolete. See 'Meaning & use' for definitions, usage, and quotation ...

1. an end of life : death She had/owned no property at the time of her demise. The musician met an untimely demise.

the end of something, usually because it has stopped being popular or successful: the demise of apartheid, sb's demise, someone's death.