What is the meaning of Tree_of_life?

A kind of tree, the arborvitae; an individual thereof.

A metaphor used to describe the phylogenetic relationships between organisms, both living and extinct; a diagram that shows those relationships, with a treelike appearance.

A term used in the Hebrew Bible that is a component of the world tree motif.

The central mystical symbol used in the Kabballah of esoteric Judaism, also known as the ten sephiroth.

Source: wiktionary.org