user interface

noun

"user-interface" is a 13-letter English headword indexed on PlainSpell.

The verdict

“user interface” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency English
14
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The visual part of a software application that a user sees and interacts with.

Corpus desk

Index EN-user-interface · user interface · English

user interface · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 14 letters
  • VOW-6 6 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "U" thin
  • PHOTO-UNK Peer pending

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Key facts for user interface
PropertyValue
Headworduser interface
LanguageEnglish
Part of speechNoun
Letters14
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “user interface” in English

user interfaceranks outside the top 100,000 English headwords, in the long tail of specialist, archaic, or seldom-used vocabulary, exactly the territory where a reader stops mid-sentence to double-check spelling.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

user interface is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "The visual part of a software application that a user sees and interacts with.".

No generated misspelling entries exist for user interface in our index, a straightforward case of a spelling with little room for common typos. Our confusable-pair dataset has no match for it, suggesting its spelling stands apart enough that readers rarely confuse it with something else.

This entry carries no recorded etymology, so its spelling is easiest to reason about phoneme by phoneme, absent a documented history. The correct English form is user interface, spelled U-S-E-R- -I-N-T-E-R-F-A-C-E.

Definition

  1. 1
    The visual part of a software application that a user sees and interacts with.

Recorded use

Wiktionary example

These source excerpts show how user interface appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. A virtual intelligence is an advanced form of user interface software. VIs use a variety of methods to simulate natural conversation, including an audio interface and an avatar personality to interact with.

Synonyms

This word in other languages

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "user interface"?
"user interface" is spelled U-S-E-R- -I-N-T-E-R-F-A-C-E.
What does "user interface" mean?
As a noun, "user interface" means: The visual part of a software application that a user sees and interacts with.
What language does "user interface" come from?
"user interface" is a English word. PlainSpell covers definitions, pronunciations, and spelling data across English, Spanish, Portuguese, French, and German.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list