life expectancy

GC: n

S: WHO – (last access: 26 October 2016); AIHW – (last access: 18 October 2016).

N: 1. life (n): Old English life (dative lif) “animated corporeal existence; lifetime, period between birth and death; the history of an individual from birth to death, written account of a person’s life; way of life (good or bad); condition of being a living thing, opposite of death; spiritual existence imparted by God, through Christ, to the believer,” from Proto-Germanic *libam, properly “continuance, perseverance,” from PIE *leip- “to remain, persevere, continue; stick, adhere”.
expectancy (n): 1590s, from Medieval Latin expectantia, from Latin expectans + -ancy. Related: Expectance.
First Known Use of life expectancy: 1935
2. Life expectancy is an estimate of how many years a person might be expected to live.
3. Estimate of the average number of additional years that a person of a given age can expect to live. The most common measure of life expectancy is life expectancy at birth. Life expectancy is a hypothetical measure. It assumes that the age-specific death rates for the year in question will apply throughout the lifetime of individuals born in that year. The estimate, in effect, projects the age-specific mortality (death) rates for a given period over the entire lifetime of the population born (or alive) during that time. The measure differs considerably by sex, age, race, and geographic location.

S: 1. OED – (last access: 26 October 2016); MW – (last access: 26 October 2016). 2. SCOTPHO – (last access: 18 October 2016). 3. EncBrit – (last access: 26 October 2016).


CR: mortality