MP4
"mp4" is a 2-letter English headword indexed on PlainSpell.
The verdict
“MP4” is a moderately-common English word, ranked #26,176 in English word frequency and used as a noun.
- #26,176
- frequency rank, English
- 3
- letters
- 20
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Abbreviation of MPEG-4 Part 14, a file format for playing music and videos.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | MP4 |
| Language | English |
| Part of speech | Noun |
| Letters | 3 |
| Frequency rank | #26,176 |
| Misspellings tracked | 0 |
| Confusable pairs | 20 |
| Source | Wiktionary (kaikki.org) |
Where “MP4” sits in English frequency
Spelling & Dictionary Insight
The English entry for MP4 is 3 letters long, classified as a noun. Corpus data places it at rank #26,176 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. The dominant gloss from Wiktionary reads: "Abbreviation of MPEG-4 Part 14, a file format for playing music and videos.".
MP4 doesn't appear in our generated misspelling index, a sign its spelling follows regular English conventions. It also participates in 20 confusable-pair relationships, "my", "Mr", "MS", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.
This entry carries no recorded etymology, so any spelling logic here comes from how the word's sounds map to letters, not a documented origin story. The correct English form is MP4, spelled M-P-4.
Definition
- 1Abbreviation of MPEG-4 Part 14, a file format for playing music and videos.
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); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Using “MP4”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is M-P-4 - every other letter order is a misspelling in standard orthography.
- Don't mix it up with “my” - see the side-by-side comparison. MP4 vs my
- Browse more English words and confusable pairs in the same reference. English words
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.