See Rhys Davids & Stede (1921–25), p. 279, entry for "Jarā", retrieved 19 November 2008 from "U. Chicago" at [1] . More than simply "old age", the PED provides the additional meanings of "decay, decrepitude"; and, these additional translations are reflected in the Buddha's reputed words in the Jarā Sutta (below). However, for the sake of semantic conciseness, the compound term jarā-maraṇa is here represented as "old age and death."
See Rhys Davids & Stede (1921–25), p. 524, entry for "Maraṇa", retrieved 19 November 2008 from "U. Chicago" at [2] . The PED further contextualizes maraṇa with "death, as ending this (visible) existence, physical death...." That is, in Buddhism, maraṇa does not refer to death of the conscious process or the end of the associated suffering.