average life
C1Formal, Academic, Technical, Business
Definition
Meaning
The typical or median duration of existence for a group of organisms, products, or entities.
A statistical measure representing the mean lifespan; can refer to biological organisms, manufactured goods (e.g., light bulbs), financial instruments (e.g., bonds), or abstract concepts in actuarial science.
Linguistics
Semantic Notes
The term is often used in technical, financial, and scientific contexts rather than everyday conversation about human life. It implies a calculated statistical average, not a subjective experience.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences; the concept is identical. Spelling follows regional conventions (e.g., 'life expectancy' vs. 'life expectancy' in surrounding text).
Connotations
Neutral and technical in both varieties.
Frequency
Equally common in technical registers in both BrE and AmE.
Vocabulary
Collocations
Grammar
Valency Patterns
The average life of [NOUN PHRASE] is [NUMBER][NOUN PHRASE] has an average life of [NUMBER]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “Live to a ripe old age”
- “On borrowed time”
Usage
Context Usage
Business
Refers to the expected duration of an asset's usefulness, e.g., 'The average life of our machinery is seven years.'
Academic
Used in demographic, biological, and actuarial studies, e.g., 'The study calculated the average life of the species under stress.'
Everyday
Rare in casual talk; replaced by 'life expectancy' or 'how long things last.'
Technical
Precise term in finance (weighted average life of bonds), engineering (product lifecycle), and epidemiology.
Examples
By Part of Speech
verb
British English
- The engineers will average the life estimates across all test batches.
- We need to average out the product lives to get a reliable figure.
American English
- The analysts will average the life expectancies from the new data.
- To budget, we average the asset life across the fleet.
adjective
British English
- The average-life calculation is crucial for the pension scheme.
- We reviewed the average-life projections.
American English
- The average-life estimate was revised upward.
- They provided an average-life analysis for the bonds.
Examples
By CEFR Level
- The average life of a smartphone is about two to three years.
- Cats have an average life of 12 to 15 years.
- The study aimed to determine the average life of the new battery technology.
- Actuaries calculate the average life to set insurance premiums accurately.
- The weighted average life of the mortgage-backed security is a key metric for investors.
- Demographers corrected the model to better predict the average life following the healthcare intervention.
Learning
Memory Aids
Mnemonic
Think of 'AVERAGE' as the middle score in a game, and 'LIFE' as the timer. Average life = the middle score on the timer of existence.
Conceptual Metaphor
LIFE IS A MEASURABLE QUANTITY; LONGEVITY IS DISTANCE/SPAN.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating directly as 'средняя жизнь' for humans in casual contexts, as it sounds odd. Use 'средняя продолжительность жизни' (average life expectancy). For objects, 'средний срок службы' is better.
Common Mistakes
- Using 'average life' to describe a boring life (confusion with 'average' as mediocre).
- Using it for an individual (e.g., 'His average life was 80 years' - incorrect; use 'lifespan').
Practice
Quiz
In which context is 'average life' LEAST likely to be used?
FAQ
Frequently Asked Questions
In demographic contexts, they are often used interchangeably. However, 'life expectancy' is more specific to the expected years at birth, while 'average life' can apply to any group or object.
No, it is a statistical term for a group. For an individual, use 'lifespan' or 'age at death'.
'Average life' usually refers to the mean (arithmetic average). 'Median lifespan' is the middle value where half die earlier and half later. They can differ significantly in skewed distributions.
In finance, Weighted Average Life (WAL) calculates the average time until principal repayments are received, weighted by the amount of each repayment. It's specific to bonds and loans.