expectation of life
B2Formal, technical, academic, journalistic
Definition
Meaning
The average number of years a person is expected to live based on statistical analysis of demographic factors like birth year, current age, and other variables.
A statistical measure of the average time an organism is expected to live, often used as an indicator of population health, healthcare quality, and socioeconomic development. In actuarial science, it refers to the average remaining lifetime for a given age.
Linguistics
Semantic Notes
The term is statistical and impersonal. It refers to a population average, not an individual prediction. Often confused with 'lifespan', which is the maximum potential years of life for a species.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage. Both varieties use 'life expectancy' identically.
Connotations
Neutral statistical term in both varieties.
Frequency
Equally common in both UK and US English in relevant contexts (health, economics, insurance).
Vocabulary
Collocations
Grammar
Valency Patterns
The life expectancy in [country/region] is [number].Life expectancy has [increased/decreased/risen/fallen].A life expectancy of [number] years.Vocabulary
Synonyms
Neutral
Weak
Usage
Context Usage
Business
Used in insurance and pension planning to assess risk and liability.
Academic
A key metric in demography, public health, and epidemiology studies.
Everyday
Discussed in news reports about health, development, and comparisons between countries.
Technical
Precisely defined in actuarial tables and population statistics.
Examples
By Part of Speech
noun
British English
- The life expectancy in the UK has risen steadily over the past century.
- These new treatments could significantly improve life expectancy.
American English
- Life expectancy in the US varies considerably by state and socioeconomic status.
- The report highlighted a troubling decline in life expectancy.
Examples
By CEFR Level
- People live longer now. Life expectancy is higher.
- Doctors say a healthy lifestyle can increase your life expectancy.
- The life expectancy in Japan is one of the highest in the world.
- Despite advances in medicine, life expectancy in the region has plateaued due to socioeconomic factors.
- Actuaries use complex models to calculate life expectancy for pension schemes.
- The disparity in life expectancy between the most and least deprived areas illustrates profound social inequality.
- While overall life expectancy has increased, healthy life expectancy has not kept pace, leading to more years spent in ill health.
Learning
Memory Aids
Mnemonic
Think: 'EXPECT-ancy' – what you can EXPECT for the duration of a LIFE, on average.
Conceptual Metaphor
LIFE IS A JOURNEY WITH A MEASURABLE DISTANCE; LIFE EXPECTANCY IS THE PROJECTED LENGTH OF THAT JOURNEY.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating as 'ожидание жизни' (which implies waiting for life). The correct conceptual equivalent is 'продолжительность жизни'.
Common Mistakes
- Using it to refer to an individual's guaranteed lifespan (e.g., 'My life expectancy is 85' – this is statistically incorrect for an individual).
- Confusing it with 'life span' (the maximum biological limit).
Practice
Quiz
What does 'life expectancy at birth' specifically refer to?
FAQ
Frequently Asked Questions
No. It is a statistical average for a large population. Your individual lifespan will be influenced by genetics, lifestyle, accidents, and many other unpredictable factors.
'Life expectancy' is an average prediction based on current data. 'Life span' refers to the maximum biological age a member of a species can reach under ideal conditions (e.g., the human lifespan is roughly 120 years).
This is due to a complex mix of biological factors (e.g., hormonal influences on cardiovascular health) and behavioural/social factors (historically higher rates of risky behaviour and occupational hazards among men).
Yes. While the long-term global trend is upward, life expectancy can fall due to events like wars, pandemics (e.g., COVID-19), severe economic collapse, or the spread of new diseases (e.g., HIV/AIDS in some regions).
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