keel over
B2Informal
Definition
Meaning
To fall over or collapse suddenly, especially due to loss of consciousness, extreme heat, or shock.
To collapse or fail suddenly and completely, whether physically, mentally, or metaphorically (e.g., a project or system).
Linguistics
Semantic Notes
Primarily used for sudden, often dramatic physical collapse, but can be humorously or hyperbolically extended to non-physical failures. Often implies an element of surprise or cause from an external factor (heat, exhaustion, news).
Dialectal Variation
British vs American Usage
Differences
No significant difference in core meaning or usage. Both varieties use it interchangeably for physical collapse and metaphorical failure.
Connotations
Conveys a somewhat vivid, informal, and slightly dramatic tone in both varieties. Not considered vulgar or slang.
Frequency
Moderate and roughly equivalent in both UK and US English. More common in spoken than formal written English.
Vocabulary
Collocations
Grammar
Valency Patterns
Subject (person/animal) + keel overSubject (person/animal) + keel over + Adjunct (cause/location)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “keel over and die”
Usage
Context Usage
Business
Rarely used literally; may appear hyperbolically ('The company nearly keeled over after the scandal').
Academic
Virtually never used.
Everyday
Common for describing fainting, collapse from heat, or humorous exaggeration ('I almost keeled over when I saw the bill').
Technical
Not used in technical contexts.
Examples
By Part of Speech
verb
British English
- During the marathon, several runners keeled over in the blistering heat.
- When he heard the news, he just keeled over onto the sofa.
American English
- She almost keeled over from laughter when she saw the video.
- The old tree finally keeled over in the storm last night.
adverb
British English
- N/A
American English
- N/A
adjective
British English
- N/A
American English
- N/A
Examples
By CEFR Level
- It was so hot, I thought I would keel over.
- The man in front of me suddenly keeled over and fell to the ground.
- After working 18 hours straight, he nearly keeled over from exhaustion.
- The entire project keeled over once the main funding was withdrawn, leaving us back at square one.
Learning
Memory Aids
Mnemonic
Imagine a ship's KEEL – the long piece along the bottom. If it rolls over (keels over), the whole ship capsizes and collapses into the water. So a person 'keeling over' is collapsing like a capsizing ship.
Conceptual Metaphor
A PERSON IS A SHIP (capsizing/losing stability).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Not 'опрокидываться' (for objects). More specific than 'падать'. Closer to 'рухнуть', 'свалиться', 'потерять сознание' when fainting.
Common Mistakes
- Incorrect: *'He keeled over the chair.' (Missing particle 'over' as part of phrasal verb). Correct: 'He keeled over.' / 'He keeled over next to the chair.'
Practice
Quiz
In which scenario is 'keel over' used LEAST appropriately?
FAQ
Frequently Asked Questions
No, it can be used for animals or even objects/entities in a metaphorical sense (e.g., 'the old tree keeled over').
Not always. It primarily means to collapse or fall over suddenly. This is often due to fainting, but it could also be from being pushed, dying, or an object's structural failure.
'Pass out' specifically means to lose consciousness. 'Keel over' emphasizes the sudden falling/collapsing motion, which usually, but not exclusively, accompanies a loss of consciousness.
No, it's informal and vivid but not offensive. It can be used humorously or in serious contexts.
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