defroster
C1Formal/Technical
Definition
Meaning
A device in a vehicle that clears frost, ice, or condensation from the windscreen and often the rear window.
Any device or substance used to remove frost or ice, such as a chemical spray or a heating element in a refrigerator.
Linguistics
Semantic Notes
Primarily refers to the car component (the 'windscreen defroster'). Extended technical uses exist (e.g., refrigerator defroster). Often used interchangeably with 'demister' in UK contexts.
Dialectal Variation
British vs American Usage
Differences
In British English, 'demister' is the more common term for the car component, though 'defroster' is understood. In American English, 'defroster' is standard; 'demister' is rarely used.
Connotations
'Defroster' suggests action against ice/frost; 'demister' suggests action against condensation/mist. The British term is more specific to its immediate function.
Frequency
High frequency in AmE, medium frequency in BrE (where 'demister' is more frequent).
Vocabulary
Collocations
Grammar
Valency Patterns
[turn on/activate/use] + the defrosterdefroster + [vent/button/switch]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None specific”
Usage
Context Usage
Business
In automotive parts retail.
Academic
In engineering texts describing vehicle climate control systems.
Everyday
Discussing car features or dealing with icy windows.
Technical
In automotive manuals and refrigerator specifications.
Examples
By Part of Speech
verb
British English
- I need to defrost the windscreen before we set off.
American English
- Could you defrost the windshield while I scrape the side windows?
adjective
British English
- The defroster function is on the dashboard.
American English
- Make sure the defroster setting is on high.
Examples
By CEFR Level
- Turn on the defroster. It is cold.
- My car has a rear-window defroster that works very well.
- The mechanic said the fault was in the defroster relay, which is why my windscreen kept misting up.
- Modern vehicles often integrate the defroster function into a sophisticated climate control system, automatically adjusting fan speed and temperature to clear condensation efficiently.
Learning
Memory Aids
Mnemonic
DE-FROST-er. It 'de'-acts the 'frost', makes it go away.
Conceptual Metaphor
COLD IS AN ENEMY / HEAT IS A TOOL. The defroster is a weapon/tool fighting the enemy (frost).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct calque 'разморозка', which means 'defrosting' as a process or 'defroster' for a refrigerator. The car component is 'обогреватель стекол' or 'антиобледенитель'.
Common Mistakes
- Confusing 'defroster' (for windows) with 'defroster' for a freezer compartment (same word, different context). Misspelling as 'defrostor' or 'deffroster'.
Practice
Quiz
In British English, what is the most common synonym for a car's 'defroster'?
FAQ
Frequently Asked Questions
A 'defroster' is typically a built-in heating element. A 'de-icer' is usually a chemical spray or fluid applied manually.
Yes, refrigerators have defrosters (often a heating element or timer) to melt ice buildup in the freezer compartment.
No, 'defroster' is a noun. The verb form is 'defrost'.
It's 'windshield defroster' in American English and 'windscreen demister' or 'defroster' in British English.