Meaning

noun the time when something ends

verb transfer by a lease or by a will

originFrom Middle English demyse, dimise, dimisse, dymyse, from Middle French démise, the feminine singular past participle of démettre (“to put down, relinquish”); from Latin dēmissa, feminine singular of perfect passive participle of dēmittō. The "death" and "end" senses derive by way of euphemism from the legal sense, as a person's death was a common way that the legal demise could be accomplished.…

Etymology from Wiktionary, CC BY-SA 3.0