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
interface
verb
interfaced; interfacing; interfaces
Definition of interface (Entry 2 of 2)
1
: to connect by means of an interface
interface a machine with a computer
2
: to serve as an interface for
Keep scrolling for more
Keep scrolling for more
Keep scrolling for more
Keep scrolling for more
Test Your Vocabulary
Who Knew?
-
- What is a ruelle?

Test your visual vocabulary with our 10-question challenge!
TAKE THE QUIZ
Anagram puzzles meet word search.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Share interface
Time Traveler for interface
The first known use of interface was in 1882
See more words from the same year