mercy killing: meaning, definition, pronunciation and examples
C1/C2Formal, medical, legal, journalistic. The term is emotionally and ethically charged.
Quick answer
What does “mercy killing” mean?
The act of killing someone (or an animal) who is suffering from an incurable disease or severe pain, in order to relieve that suffering.
Audio
Pronunciation
Definition
Meaning and Definition
The act of killing someone (or an animal) who is suffering from an incurable disease or severe pain, in order to relieve that suffering.
Can be used metaphorically to describe ending something that is perceived to be suffering or in a hopeless state (e.g., a failing project, a terminally ill business) to prevent further pain or waste of resources.
Dialectal Variation
British vs American Usage
Differences
Both varieties use the term identically in meaning and register.
Connotations
Identical strong ethical and emotional connotations in both varieties.
Frequency
Similar frequency in both varieties within medical, legal, and ethical discussions.
Grammar
How to Use “mercy killing” in a Sentence
[Subject] performed/carried out a mercy killing on [Patient/Object].A mercy killing of [Patient/Object] took place/was carried out.The [Subject] was involved in a mercy killing.Vocabulary
Collocations
Examples
Examples of “mercy killing” in a Sentence
verb
British English
- The vet may need to mercy-kill the injured horse.
- He claimed he mercy-killed his wife to end her agony.
American English
- They had to mercy-kill their terminally ill dog.
- The defendant admitted he mercy-killed his friend at his request.
adverb
British English
- The animal was put down mercy-killingly. (Extremely rare and awkward; not recommended.)
American English
- He acted mercy-killingly. (Extremely rare and awkward; not recommended.)
adjective
British English
- The mercy-killing act was debated in Parliament.
- He faced mercy-killing charges.
American English
- The state's mercy-killing law is under review.
- A mercy-killing scenario was presented to the ethics committee.
Usage
Meaning in Context
Business
Rare. Possibly metaphorical: 'The board decided the project was a mercy killing after three years of losses.'
Academic
Common in medical ethics, philosophy, law, and sociology papers discussing end-of-life care and patient rights.
Everyday
Used in serious discussions about terminal illness, pet euthanasia, or news stories about controversial cases.
Technical
Used in legal documents, medical journals, and bioethical discourse, though 'euthanasia' is often preferred for precision.
Vocabulary
Synonyms of “mercy killing”
Strong
Neutral
Weak
Vocabulary
Antonyms of “mercy killing”
Watch out
Common Mistakes When Using “mercy killing”
- Confusing with 'murder' (which lacks the element of consent/suffering). Mistaking for a casual or informal term (it is serious). Using it to describe suicide without a terminal illness context.
FAQ
Frequently Asked Questions
They are often used interchangeably, but 'euthanasia' is a broader, more clinical term encompassing both active and passive acts. 'Mercy killing' specifically implies an active, intentional act motivated by compassion to end suffering.
Laws vary drastically by country and jurisdiction. In most places, it is illegal for humans, though some regions have legalised forms of assisted dying. For animals, euthanasia by veterinarians is legal and common.
Mercy killing typically involves one person directly causing the death of another (e.g., administering a lethal injection). Assisted suicide involves one person providing the means (like drugs) for another to end their own life.
Because it sits at the intersection of deeply held values: compassion for suffering versus the sanctity/inviolability of life. It raises difficult questions about consent, the role of medical professionals, and the potential for abuse.
The act of killing someone (or an animal) who is suffering from an incurable disease or severe pain, in order to relieve that suffering.
Mercy killing is usually formal, medical, legal, journalistic. the term is emotionally and ethically charged. in register.
Mercy killing: in British English it is pronounced /ˈmɜːsi ˌkɪlɪŋ/, and in American English it is pronounced /ˈmɝːsi ˌkɪlɪŋ/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “To put (an animal) out of its misery (a less formal, often animal-specific equivalent).”
Learning
Memory Aids
Mnemonic
Think: MERCY = compassion, KILLING = causing death. A 'compassionate killing' to end suffering.
Conceptual Metaphor
DEATH IS RELEASE (from suffering). SUFFERING IS A BURDEN. COMPASSION IS A FORCE FOR ACTION.
Practice
Quiz
Which of the following is the closest synonym to 'mercy killing' in a medical ethics context?