EN
The article discusses the definition of death from metaphysical and biological points of view. Also, the paper analyzes various criteria of human death. The considerations are based on a methodological assumption that first of all a proper definition of death should be given, and then criteria assisting in recognizing a state defined as already existent should be set. An anatomical (neurological) criterion of human death is characterized as a real state of patient's death when irreversible atrophy of all cerebral functions has been diagnosed.