interface

UK: noun: /ˈɪntə^rfeɪs/, verb: /ˈɪntə^rfeɪs/ /ˌɪntə^rˈfeɪs/

US: /n. ˈɪntɚˌfeɪs; v. also ˌɪntɚˈfeɪs/

US: (n. in′tər fās′; v. in′tər fās′, in′tər fās′)

Inflections of 'interface' (v): (⇒ conjugate)

interfaces

v 3rd person singular

interfacing

v pres p

interfaced

v past

interfaced

v past p

WordReference Random House Learner's Dictionary of American English © 2025

in•ter•face /n. ˈɪntɚˌfeɪs; v. also ˌɪntɚˈfeɪs/   n., v., -faced, -fac•ing. 
n. [countable]

1. the area linking several disciplines or fields of study.
2. something that makes it possible for separate elements to work together or communicate:
   A new computer interface allows these machines to communicate.

v. 

3. to (cause to) be brought into an interface: [no object]
   The systems could not interface.
   [~ + object]
   to interface the two systems.
4. to meet or communicate directly:
   [~ + with + object] His job required him to interface with the Art Department.

See -face-.

WordReference Random House Unabridged Dictionary of American English © 2025

in•ter•face  (n. in′tər fās′;v. in′tər fās′, in′tər fās′), n., v., -faced, -fac•ing. 
n. 

1. a surface regarded as the common boundary of two bodies, spaces, or phases.
2. the facts, problems, considerations, theories, practices, etc., shared by two or more disciplines, procedures, or fields of study:
   the interface between chemistry and physics.
3. a common boundary or interconnection between systems, equipment, concepts, or human beings.
4. communication or interaction:
   Interface between the parent company and its subsidiaries has never been better.
5. a thing or circumstance that enables separate and sometimes incompatible elements to coordinate effectively:
   The organization serves as an interface between the state government and the public.
6. [Computers.]
   • Computing equipment or programs designed to communicate information from one system of computing devices or programs to another.
   • Computing any arrangement for such communication.

v.t. 

7. to bring into an interface.
8. to bring together;
   connect or mesh:
   The management is interfacing several departments with an information service from overseas.

v.i. 

9. to be in an interface.
10. to function as an interface.
11. to meet or communicate directly;
    interact, coordinate, synchronize, or harmonize (often fol. by with):
    The two communications systems are able to interface with each other.

• inter- + face 1880–85

Collins Concise English Dictionary © HarperCollins Publishers::

interface noun / ˈɪntəˌfeɪs/

1. a surface that forms the boundary between two bodies, liquids, or chemical phases
2. a common point or boundary between two things, subjects, etc
3. an electrical circuit linking one device, esp a computer, with another

verb / ˌɪntəˈfeɪs/

1. (transitive) to design or adapt the input and output configurations of (two electronic devices) so that they may work together compatibly
2. to be or become an interface (with)
3. to be or become interactive (with)

interfacial / ˌɪntəˈfeɪʃəl/ adjective

ˌinterˈfacially adverb