What does interface mean?
An interface is the point at which two people, devices, systems, or components meet and communicate. It may be a physical boundary, but in modern usage it often means the controls and displays through which someone operates a computer, application, or digital service. The word can also describe a wider connection between people or organizations, especially in business, technology, and government. For example, a well-designed user interface makes software easier to understand, while a system designed to work with existing databases provides an interface to those databases. As a verb, interface means to connect with or interact with another system. The term is common in computing but is not restricted to computers: it can describe any organized means of communication or connection. Its usefulness lies in capturing both the technical and human dimensions of a meeting point, whether that meeting takes place between hardware and software, two institutions, or a person and a service.
A boundary, point of contact, or means of communication between two people, systems, or components; especially the controls and displays through which a user operates a computer or other device.
"The application was rejected because its interface was difficult to navigate."
The computing sense is widely understood in both formal and informal usage. In other contexts, the word often carries a technical or institutional tone.
To connect with, communicate with, or interact with another person, system, or component.
"The sensor interfaces with the central monitoring system."
This use is formal or technical and is especially common in computing, engineering, and institutional contexts.
The plural is used when referring to multiple boundaries, controls, connection points, or systems for communication.
"The software provides several interfaces for accessing the shared database."
A screen may be called an interface, but the word means more than a display: it names the whole meeting point where a person and a system meet.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of interface
The English word was formed in the 19th century from inter-, meaning “between,” and face, meaning a surface or boundary. It developed through French interface, which was associated with Latin elements meaning “between” and “face, form, or appearance.” The same Latin root underlies cognates such as facial, facade, and surface, while interfacial is a later English derivative combining elements from the same word family.
Related word forms
How interface is actually used
The word is standard in technical, business, and digital-design contexts. As a verb it can sound formal or institutional, while in computing it is familiar and broadly understood.
Easily confused with interface
An interface is a point of connection or communication, whereas to interfere is to hinder or intrude on a process.