1.NounAn investigation into the details and activities of a person over the course of their lifetime; one’s background.
"His life history shows that he frequently moves from town to town, moving from one job to the next."
2.NounInformation concerning a person’s diseases and medical disorders suffered during his or her lifetime; especially useful if the disorders are genetic.
3.NounThe set of stages that an organism, or a species, experiences over its lifetime, from conception to death.