in·ter·face
ˈin-tər-ˌfās 
1
a
: the place at which independent and often unrelated systems meet and act on or communicate with each other
the man-machine interface
b
: the means by which interaction or communication is achieved at an interface
2
: a surface forming a common boundary of two bodies, spaces, or phases
an oil-water interface
interfaced; interfacing; interfaces
1
: to connect by means of an interface
interface a machine with a computer
2
: to serve as an interface for
Examples of interface in a Sentence
Noun
the interface between engineering and science
The software has a user interface that's easy to operate.
We installed an interface between the computer and the typesetting machine.
Verb
interface a machine with a computer
the point at which the two machines interface
Recent Examples on the Web
Blake Bakkila, Architectural Digest, 8 Oct. 2025
The defense supply chain uses Taiwan’s semiconductor and AI strength to embed deep learning, autonomous navigation, and on-the-fly sensor fusion into nearly every new system, from small FPV quadcopters to command-and-control interfaces for PAC-3 and NASAMS.
—Kapil Kajal, Interesting Engineering, 8 Oct. 2025
Sofia Celeste, Footwear News, 25 Sep. 2025
How should a piece of software be interfaced with a larger system?
—Stephen Cass, IEEE Spectrum, 23 Sep. 2025
See All Example Sentences for interface
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show current usage.
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Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
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Noun
Our commerce writer Julia Harrison writes that her Moccamaster One Cup is a delight, principally because of its simplicity as a drip coffee maker—free of extraneous frothers or digital interfaces or timers.
—Blake Bakkila, Architectural Digest, 8 Oct. 2025
The defense supply chain uses Taiwan’s semiconductor and AI strength to embed deep learning, autonomous navigation, and on-the-fly sensor fusion into nearly every new system, from small FPV quadcopters to command-and-control interfaces for PAC-3 and NASAMS.
—Kapil Kajal, Interesting Engineering, 8 Oct. 2025
Verb
New Frontiers Likewise, Nilufar’s aim is to open regional offices in key cities to interface with the booming contract and luxury hotel businesses in those areas, as well as in Asian capitals like Singapore and Seoul.
—Sofia Celeste, Footwear News, 25 Sep. 2025
How should a piece of software be interfaced with a larger system?
—Stephen Cass, IEEE Spectrum, 23 Sep. 2025
See All Example Sentences for interface
Cite this Entry
“Interface.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/interface. Accessed 10 Oct. 2025.
Copy CitationKids Definition
interface
1 of 2 noun
in·ter·face
ˈint-ər-ˌfās
1
: a surface forming a common boundary of two bodies, spaces, or phases
an interface between oil and water
2
a
: the place at which independent systems meet and act on or communicate with each other
b
: the ways by which interaction or communication is brought about at an interface
interface
2 of 2 verb1
: to connect or become connected through an interface
2
: to serve as an interface for
Medical Definition
interface
noun
in·ter·face
ˈint-ər-ˌfās
: a surface forming a common boundary of two bodies, spaces, or phases
interfaces between various tissues such as skin, fatty tissue, and muscle—H. P. Schwan
H. P. Schwan
interface
transitive verb
interfaced; interfacing
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