obsolete multicellular organism aging https://github.com/geneontology/go-ontology/issues/24930 true OBSOLETE. An aging process that has as participant a whole multicellular organism. Multicellular organism aging includes loss of functions such as resistance to disease, homeostasis, and fertility, as well as wear and tear. Multicellular organisms aging includes processes like cellular senescence and organ senescence, but is more inclusive. May precede death (GO:0016265) of an organism and may succeed developmental maturation (GO:0021700). The reason for obsoletion is that this represents a phenotype. GO:0010259 biological_process