Connection vs Interface

When to use each in English, with meaning, register, and examples.

Connection

Top 1,000 (very common)B1noun

Interface

Top 1,000 (very common)C1noun
 ConnectionInterface
Pronunciation🇬🇧 /["/kəˈnekʃn/"]/🇺🇸 /["/kəˈnekʃn/"]/🇬🇧 /["/ˈɪntəfeɪs/"]/🇺🇸 /["/ˈɪntərfeɪs/"]/
MeaningA relationship or link between people or things.The way different things work together or connect.
ExampleThe connection between the two friends grew stronger over time.a user-friendly interface
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 1,000 (very common)
CEFR levelB1C1
Part of speechnounnoun
Collocationsclear, close, direct, have, discover, establish, in connection with, connection among, connection between, in that/​this connection, loose, electrical, phone, break, charge, fee, connection to, loose, electrical, phone, break, charge, fee, connection to, good, tight, bus, make, miss, connection between, good, tight, bus, make, miss, connection between, good, aristocratic, business, have, use, through connectionuser interface, interface design, graphical interface
Antonymsdisconnection, separationseparation, isolation, disconnect
Common mistakesConfused with 'correlation' — 'connection' is broader than just a measurable relationship., Using 'connections' as singular — 'connection' is needed for the singular form., Misplacing prepositions — it’s 'connection to' or 'connection with'.Confusing 'interface' with 'interact', Using 'interface' as a verb instead of a noun, Mispronouncing it with incorrect stress on syllables
Usage notesUse 'connection' in both social and technical contexts. Avoid using it in overly casual situations, where simpler terms might be more appropriate.Commonly used in tech and design contexts. Avoid in everyday conversation unless talking specifically about technology. Can imply a professional or technical context.

Frequently asked questions: Connection vs Interface

What's the difference between Connection and Interface?

Connection: A relationship or link between people or things. Interface: The way different things work together or connect.

Are Connection and Interface the same CEFR level?

Connection: B1, Interface: C1 on the CEFR scale.

Can I use Connection and Interface interchangeably?

Not always. Connection and Interface are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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