EPR

noun

By · According to Wiktionary data (CC BY-SA) ·

"epr" is a 3-letter English headword indexed on PlainSpell.

The verdict

“EPR” is uncommon English (frequency #51,687 among 18,836 “E” headwords), classed as a noun. The kind of spelling people second-guess.

#51,687
frequency rank, English
18,836
“E” headwords

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Initialism of engine pressure ratio (the ratio of pressure between exhaust and inlet of a jet engine).

Key facts for EPR
PropertyValue
HeadwordEPR
LanguageEnglish
Part of speechNoun
Letters3
Frequency rank#51,687
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “EPR” sits in English frequency

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right). EPR lands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Rare enough to double-check

EPR is uncommon English at frequency #51,687 among 18,836 “E” headwords, classed as anoun. Rarity is why readers land here mid-draft. 5 senses are on record.

The misspelling generator found no plausible variants for EPR, a sign its spelling follows regular English conventions. No close-neighbour confusable shows up for this headword in our dataset, which typically means the spelling is too distinctive to be mistaken for another word.

Etymologically, the entry records: Abbreviation The correct English form is EPR, spelled E-P-R.

Definition

  1. 1
    Initialism of engine pressure ratio (the ratio of pressure between exhaust and inlet of a jet engine).
  2. 2
    Initialism of expected profit rate.
  3. 3
    Initialism of European Pressurised Reactor, a type of nuclear reactor, later also an initialism of Evolutionary Power Reactor.
  4. 4
    Initialism of electronic patient record.
  5. 5
    Initialism of extended producer responsibility.

Etymology

Abbreviation

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

How do you spell "EPR"?
"EPR" is spelled E-P-R.
What does "EPR" mean?
As a noun, "EPR" means: Initialism of engine pressure ratio (the ratio of pressure between exhaust and inlet of a jet engine).
What is the origin of the word "EPR"?
Abbreviation See the full etymology section above for more details.
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.

Using “EPR”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is E-P-R - every other letter order is a misspelling in standard orthography.
  • Browse more English words and confusable pairs in the same reference. English words

Other uncommon English words near this rank

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.

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

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list