# interface

> English word · Noun · IPA /ˈɪntəfeɪs/ · frequency rank #5,887

## Definitions
1. The point of interconnection or contact between entities.
2. A thin layer or boundary between different substances or two phases of a single substance.
3. The point of interconnection between systems or subsystems.
4. The connection between a user and a machine.
5. The connection between parts of software; also the public or published sections of an object or module.
6. In object-oriented programming, a piece of code defining a set of operations that other code must implement.
7. In some languages, a block of code declaring the interface (point of interconnection) between a class and code that interacts with it.
8. The internal surface of a coiled protein (compare exoface).

## Etymology
From inter- (“between”) + face (“shape, figure, form”).

## Easily confused with
- **interfere** (https://plainspell.com/en/vs/interface-vs-interfere)
- **interfaces** (https://plainspell.com/en/vs/interface-vs-interfaces)
- **interact** (https://plainspell.com/en/vs/interact-vs-interface)

## Common misspellings (13)
`inetrface`, `innterface`, `intefrace`, `interafce`, `interfacce`, `interfaec`, `interfcae`, `interfface`, `interrface`, `intreface`, `intterface`, `itnerface`, `niterface`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/interface