in·​ter·​face | \ ˈin-tər-ˌfās How to pronounce interface (audio) \

Definition of interface

 (Entry 1 of 2)

1a : 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

Definition of interface (Entry 2 of 2)

transitive verb

1 : to connect by means of an interface interface a machine with a computer
2 : to serve as an interface for

intransitive verb

1 : to become interfaced
2 : to interact or coordinate harmoniously

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Other Words from interface


interfacial \ ˌin-​tər-​ˈfā-​shəl How to pronounce interface (audio) \ adjective

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
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Recent Examples on the Web: Noun Beyond settling on a name, Netflix’s product designers also needed to nail down where in the user interface this new functionality would show up. Josef Adalian, Vulture, "Inside Netflix’s Quest to End Scrolling," 28 Apr. 2021 Also included in the web interface are settings for adjusting the two Wi-Fi networks. Mark Sparrow, Forbes, "D-Link’s 5G Router Is A Smart Way To Get Online Wirelessly," 15 Apr. 2021 On the contrary, the initial incarnation, while intriguing, had some glaring flaws with respect to battery life, the user interface, and more. Mike Wehner, BGR, "6 cool Apple Watch features you probably didn’t know existed," 21 Apr. 2021 Additionally, these tools should interoperate with current productivity tools, interface with your CRM system, automate data captures of your MOF activities and provide more visibility that is currently unavailable. Freddy Jose Mangum, Forbes, "How Investing In Sales Engineering Can Significantly Improve Middle-Of-Funnel Conversions," 16 Apr. 2021 The Unity version launched with poor performance, a confusing user interface and several missing features, many of which are still absent today. Washington Post, "Flash is dead. These games from the early 2000s hope to live on.," 8 Apr. 2021 His interface with spirituality, largely through his wife Rebecca... Lauren Puckett, Town & Country, "Hulu's WeWork Doc Director Jed Rothstein on the Mythology and Tragedy of the Unicorn's Downfall," 4 Apr. 2021 For instance, the Indian government’s unified payment interface (UPI), which allows users to transfer money directly from bank accounts, has eliminated the need to add money into digital wallets. Prathamesh Mulye, Quartz, "India’s most-valued unicorn has spread itself too thin," 22 Mar. 2021 Their ensuing duet treated the constraints of Instagram’s interface (two adjacent boxes, one performer in each) as a creative invitation. New York Times, "5 Notes From a Quiet Year: How Music Survived the Pandemic," 11 Mar. 2021 Recent Examples on the Web: Verb Apps and wearables are easily accessed through smartphones and can interface across devices, even in your car. Trisha Swift, Forbes, "Enhance Brain Health With High-Tech Holistic Medicine," 12 Apr. 2021 At one point, Morgan even paused our interview to briefly interface with a local resident. Alfred Konuwa, Forbes, "Former WWE Star Matt Morgan On In-Ring Return At Seminole ShowDown, WrestleMania 37," 10 Apr. 2021 Plus, a ham radio can interface with a computer or tablet to send data, texts, images, or Morse code, which makes the class even more valuable and versatile than other types of two-way radios that are only capable of transmitting audio. Gabrielle Hondorp, Popular Mechanics, "The Best Two-Way Radios, From Ham and CB to Increasingly Popular GMRS," 9 Apr. 2021 Touchpads provide a terrific way to interface with so many different types of devices. Maren Estrada, BGR, "OMG… there’s finally a $15 replacement for your awful, awful Apple TV remote," 26 Mar. 2021 The 15,600-square-foot house is spread over three levels that interface with nearly 7,000 square feet of terraces, gardens and pools, lending the rectilinear structure an open relationship to its surroundings. Basem Wasef, Robb Report, "VIP Parking: 5 Amazing Garages That Showcase Your Cars Like Works of Art," 13 Mar. 2021 The Silver Line will also interface with the Red and Orange lines in Richardson and Plano, the Green Line in Carrollton and the Orange Line at DFW Airport. Teri Webster, Dallas News, "Plano receives 16,000 feet of additional rail for DART Silver Line construction," 28 Dec. 2020 The team has instituted strict protocols for club employees who interface with players, including hotel rooms at an Omni adjacent to club headquarters and testing available to club employees’ family members. Jori Epstein, USA TODAY, "Cowboys owner Jerry Jones says he’ll ‘absolutely’ get COVID-19 vaccine once eligible," 18 Dec. 2020 Demonstrators accused the medical center of prioritizing more senior doctors and other medical workers who don't directly interface with patients over employees at the highest risk of contracting Covid-19 from patients. NBC News, "Covid live updates: Latest on Covid vaccine distribution and second stimulus checks," 19 Dec. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'interface.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of interface


1882, in the meaning defined at sense 2


1962, in the meaning defined at transitive sense 1

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Time Traveler for interface

Time Traveler

The first known use of interface was in 1882

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Statistics for interface

Last Updated

7 May 2021

Cite this Entry

“Interface.” Dictionary, Merriam-Webster, Accessed 17 May. 2021.

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More Definitions for interface



English Language Learners Definition of interface

 (Entry 1 of 2)

: the place or area at which different things meet and communicate with or affect each other
: a system that is used for operating a computer : a system that controls the way information is shown to a computer user and the way the user is able to work with the computer
: an area or system through which one machine is connected to another machine



English Language Learners Definition of interface (Entry 2 of 2)

: to connect or become connected : to connect by means of an interface


in·​ter·​face | \ ˈint-ər-ˌfās How to pronounce interface (audio) \

Medical Definition of interface

: 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

Other Words from interface

interface transitive verb interfaced; interfacing
interfacial \ ˌint-​ər-​ˈfā-​shəl How to pronounce interface (audio) \ adjective

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