Meaning

verb fail to keep or to maintain; cease to have, either physically or in an abstract sense

adjective no longer in your possession or control; unable to be found or recovered

noun people who are destined to die soon

originFrom Middle English loste, losede (preterite) and Middle English lost, ilost, ilosed (past participle), from Old English losode (preterite) and Old English losod, ġelosod, equivalent to lose + -t.

Etymology from Wiktionary, CC BY-SA 3.0