lethality: meaning, definition, pronunciation and examples
C1Formal, Technical, Journalistic
Quick answer
What does “lethality” mean?
The quality of causing death.
Audio
Pronunciation
Definition
Meaning and Definition
The quality of causing death; deadliness.
The capacity or potential to cause death or destruction; often used to measure or describe the effectiveness or dangerousness of weapons, diseases, or situations.
Dialectal Variation
British vs American Usage
Differences
No significant spelling or usage differences. Usage patterns are identical across varieties.
Connotations
In both varieties, strongly associated with military, medical, and security contexts.
Frequency
Slightly more frequent in American English due to higher prevalence in military-industrial and public health discourse.
Grammar
How to Use “lethality” in a Sentence
the lethality of [noun]lethality against [target]lethality in [context]Vocabulary
Collocations
Examples
Examples of “lethality” in a Sentence
verb
British English
- The new variant is predicted to lethally outcompete the old one.
- The policy was lethally flawed from the start.
American English
- The software bug could lethally compromise the system.
- The debate focused on how to lethally engage the target.
adverb
British English
- The virus spread lethally through the care home.
- The car spun lethally towards the crowd.
American English
- The policy failed lethally on its first implementation.
- The two chemicals react lethally when mixed.
adjective
British English
- The lethal injection protocol was reviewed.
- He made a lethal error in calculation.
American English
- The weapon system has a lethal range of five miles.
- She gave him a lethal look.
Usage
Meaning in Context
Business
Rare, except in pharmaceutical, defence, or risk management sectors (e.g., 'assessing the product's potential lethality').
Academic
Common in medical, epidemiological, military studies, and ethics papers (e.g., 'studying the virus's lethality').
Everyday
Very rare; used only in news discussions about weapons, pandemics, or accidents.
Technical
The primary register. Used precisely in military science, toxicology, and medicine to quantify death-causing potential.
Watch out
Common Mistakes When Using “lethality”
- Using 'lethality' to mean 'cruelty' or 'violence'.
- Pronouncing it /liːˈθælɪti/ (with a long 'ee' sound).
- Using it in casual contexts where 'danger' would be more appropriate.
FAQ
Frequently Asked Questions
They are related but distinct. 'Lethality' is the inherent capacity to cause death. 'Mortality rate' is a statistical measure of the proportion of deaths in a population. A disease can have high lethality (kills many of those infected) but a low mortality rate (if few people get infected).
Only metaphorically in very formal or literary contexts (e.g., 'the lethality of his logic'). In standard usage, it pertains to physical death or destruction.
The direct related adjective is 'lethal'. 'Lethal' means sufficient to cause death.
No. It is a mid-frequency word used primarily in specific technical, medical, military, and journalistic contexts. Most everyday speakers would use 'deadliness' or simply say 'how deadly it is'.
The quality of causing death.
Lethality is usually formal, technical, journalistic in register.
Lethality: in British English it is pronounced /lɪˈθælɪti/, and in American English it is pronounced /lɪˈθælɪti/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None directly; the word itself is technical and not typically used in idiomatic expressions.”
Learning
Memory Aids
Mnemonic
Think of 'lethal' (deadly) + 'ity' (makes it a noun) → 'the quality of being lethal'.
Conceptual Metaphor
LETHALITY IS A MEASURABLE FORCE / LETHALITY IS A QUOTIENT.
Practice
Quiz
In which context is the word 'lethality' LEAST likely to be used appropriately?