key card
B1Formal & Informal (everyday technical term)
Definition
Meaning
A small, plastic card, often with a magnetic strip, RFID chip, or electronic circuitry, used to unlock a door (especially in a hotel, office, or secure facility).
1) Any card-shaped device used for identification, access, or payment where its key function is to grant entry or authorization. 2) A card required to operate something, e.g., to start a vehicle or power on equipment.
Linguistics
Semantic Notes
The term has evolved from purely physical access to include digital and payment contexts. While often synonymous with 'access card', 'key card' emphasizes its function as a key replacement. It is a compound noun, typically written with a space.
Dialectal Variation
British vs American Usage
Differences
Minimal lexical difference. 'Key card' is standard in both. British English may more frequently encounter 'key card' in hotel contexts, while American English might use it equally for offices, gyms, and apartments.
Connotations
Neutral in both, associated with modern security and convenience.
Frequency
Slightly more frequent in American English due to the wider adoption of card-based access systems in residential buildings.
Vocabulary
Collocations
Grammar
Valency Patterns
[Subject] + swipes/taps/uses + a/the + key card[Subject] + was issued/given + a + key card + [by Agent][Key card] + grants/denies + accessVocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “Hold the key card to success (metaphorical extension).”
Usage
Context Usage
Business
Used for secure access to office buildings, server rooms, and restricted floors.
Academic
Might appear in texts on security technology, hospitality management, or urban sociology.
Everyday
Primarily used in travel (hotels), apartment living, gyms, and rental cars.
Technical
In security systems engineering, specifies a type of credential form factor.
Examples
By Part of Speech
verb
British English
- The system allows you to key-card your way in.
- He key-carded into the secure laboratory.
American English
- You need to key-card the door to unlock it.
- She key-carded through the main gate.
adjective
British English
- The key-card reader was broken.
- We have a key-card entry system.
American English
- The key-card access is down.
- It's a key-card operated vehicle.
Examples
By CEFR Level
- I lost my hotel key card.
- You need a key card to open this door.
- The receptionist gave me a key card for my room on the third floor.
- Please swipe your key card to enter the building.
- Instead of a traditional key, the new apartment complex issues electronic key cards to all residents.
- The key card failed to work, so I had to get a replacement from the front desk.
- The sophisticated security protocol requires dual authentication: a biometric scan followed by presenting a digitally-encoded key card.
- Corporate espionage concerns led them to upgrade from magnetic stripe key cards to encrypted smart card technology.
Learning
Memory Aids
Mnemonic
Think of a KEY that is shaped like a CARD. It combines the function of a 'key' with the form of a 'card'.
Conceptual Metaphor
AUTHORIZATION IS A PHYSICAL KEY / DATA IS AN OBJECT (the data on the card is the 'key').
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid calquing as 'ключевая карта' or 'карта-ключ' (though the latter is sometimes used). The standard term is 'пластиковая карта-ключ' or more commonly 'карта-пропуск'. The direct translation 'ключ карта' is incorrect.
- Do not confuse with 'банковская карта' (bank card) or 'визитная карточка' (business card).
Common Mistakes
- Misspelling as 'keycard' (though sometimes accepted) or 'key-card'.
- Using 'key card' to refer to a credit card with a chip.
- Incorrect preposition: 'enter *by* key card' (less common) vs. 'enter *with* a key card'.
- Confusing it with a 'key fob' (a separate small device).
Practice
Quiz
In which of the following contexts is the term 'key card' LEAST likely to be used?
FAQ
Frequently Asked Questions
Both forms are commonly seen, but 'key card' (two words) is the more standard dictionary entry. 'Keycard' is often used in branding and technical specifications.
A key card's primary function is to grant physical or digital access (like opening a door). A credit card's primary function is to make payments. However, some cards (like hotel keys) can combine both functions.
Yes, in modern digital access systems, a smartphone app can function as a 'digital key card,' using Bluetooth or NFC to communicate with the lock, replicating the function of a physical card.
Typically, you should return to the issuing authority (e.g., hotel front desk, office security) to have it checked, reprogrammed, or replaced. Key cards can be demagnetized by being placed near strong magnets or other electronic devices.