Death
A chart describes tendencies in a traditional system. It cannot decide health, money, law, marriage or children.
In the classical sources
其生死之分如母生子，子成而母老死，理之自然。
The division of birth and death is like a mother bearing a child: the child comes of age and the mother grows old and dies, which is the natural order.
三命通會 卷二
About this stage
死 is a position, the place in the round of twelve where a stem's force has run out. 三命通會 卷二 explains it with the quoted comparison and says each yin stem begins life where its yang partner ends, so the two hand off at that branch: 甲 has its 死 at 午, where 乙 starts.
The same chapter reasons it out stem by stem with images that are practical and rather mild, 丙 setting in the west at 酉 and the lamp 丁 fading at sunrise. 三命通會 warns that a 死 or 絕 is not to be called bad on sight and speaks of such a shortfall as something to be supported. The word says how the stem stands at one branch, and the stage speaks of no person's life or death.
Where this text comes from
The order of the twelve stages follows 五行大義 volume 2 and 三命通會 volume 2 on Wikisource. The calculator uses that order for wood, fire, metal and water. Works disagree about earth.
The English name follows common modern usage. The wording here is our own plain summary.