pi

/ˈpi/

//ˈpi// noun

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

The verdict

“pi” is a regularly-used Portuguese word, ranked #9,089 in Portuguese word frequency and used as a noun.

#9,089
frequency rank, Portuguese
2
letters
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - a letra Π (minúscula: π) do alfabeto grego

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

pi vs PT
0% similar
pi vs pó
50% similar
pi vs por
33% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for pi
PropertyValue
Headwordpi
LanguagePortuguese
Part of speechNoun
IPA/ˈpi/
Letters2
Frequency rank#9,089
Misspellings tracked0
Confusable pairs20
SourceWiktionary (kaikki.org)

Where “pi” sits in Portuguese 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). pi lands here:

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

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

Spelling & Dictionary Insight

The Portuguese entry for pi is 2 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /ˈpi/. Corpus data places it at rank #9,089 in overall Portuguese word frequency, indicating it appears regularly in written and spoken text. Wiktionary records 2 distinct senses for this headword, so context determines which meaning a reader should apply.

pi doesn't appear in our generated misspelling index, a straightforward case of a spelling with little room for common typos. It also participates in 20 confusable-pair relationships, "PT", "pó", "por", 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 its spelling is best explained by sound-to-letter mapping rather than etymology. The correct Portuguese form is pi, spelled P-I.

Definition

  1. 1
    a letra Π (minúscula: π) do alfabeto grego
  2. 2
    número irracional que é a razão entre o perímetro de um círculo e o seu diâmetro; aproximadamente, 3,1415926

This word in other languages

pi(English)pi(Français)

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 Portuguese corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "pi"?
"pi" is spelled P-I. The IPA pronunciation is /ˈpi/.
What does "pi" mean?
As a noun, "pi" means: a letra Π (minúscula: π) do alfabeto grego
What words are commonly confused with "pi"?
"pi" is commonly confused with "PT", "pó", "por". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "pi"?
The IPA (International Phonetic Alphabet) transcription for "pi" is /ˈpi/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "pi" come from?
"pi" is a Portuguese word. You can look up definitions, pronunciations, and spelling data for this and other words across English, Spanish, Portuguese, French, and German on PlainSpell.
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 “pi”

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

  • The one correct Portuguese spelling is P-I - every other letter order is a misspelling in standard orthography.
  • Say it as /ˈpi/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Don't mix it up with “PT” - see the side-by-side comparison. pi vs PT
  • Browse more Portuguese words and confusable pairs in the same reference. Portuguese 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.

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

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