Death — the cessation of life, whether physical, spiritual, or eternal. Thanatos is the great enemy in the NT drama: it entered through sin (Romans 5:12), reigned over humanity, and was ultimately conquered by Christ's resurrection. It is personified as 'the last enemy' (1 Corinthians 15:26).
Death in the Bible is always an intruder, never natural — it is 'the wages of sin' (Romans 6:23). Christ's death on the cross was not defeat but the destruction of death itself: 'By dying he destroyed death.' The resurrection proves that thanatos has been swallowed up in victory (1 Corinthians 15:54). Revelation's final vision: 'Death and Hades were thrown into the lake of fire' (20:14). The Christian hope is not avoidance of death but its ultimate abolition.