Boolean
/ˈbuːl.i.ən/
"boolean" is a 7-letter English headword indexed on PlainSpell.
The verdict
“Boolean” is a moderately-common English word, ranked #30,706 in English word frequency and used as an adjective.
- #30,706
- frequency rank, English
- 7
- letters
- 9
- tracked misspellings
- 1
- confusable pair
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Of or pertaining to the work of George Boole.
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 | Boolean |
| Language | English |
| Part of speech | Adjective |
| IPA | /ˈbuːl.i.ən/ |
| Letters | 7 |
| Frequency rank | #30,706 |
| Misspellings tracked | 9 |
| Confusable pairs | 1 |
| Source | Wiktionary (kaikki.org) |
Where “Boolean” sits in English frequency
Spelling & Dictionary Insight
The English entry for Boolean is 7 letters long, classified as an adjective, and transcribed in the International Phonetic Alphabet as /ˈbuːl.i.ən/. Corpus data places it at rank #30,706 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 2 distinct senses for this headword, so context determines which meaning a reader should apply.
Our generated misspelling index lists 9 likely wrong-spelling variants for Boolean, with forms such as "bboolean", "bolean", and "boloean". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. It also participates in 1 confusable-pair relationship, "Boleyn", a pairing that trips writers up because the two words share enough sound or shape to blur together.
Etymologically, the entry records: From Boole + -ean, named after English mathematician, philosopher and logician George Boole (1815–1864). The correct English form is Boolean, spelled B-O-O-L-E-A-N.
Definition
- 1Of or pertaining to the work of George Boole.
- 2Pertaining to data items that can have “true” and “false” (or, equivalently, 1 and 0 respectively) as their only possible values and to operations on such values.
Etymology
From Boole + -ean, named after English mathematician, philosopher and logician George Boole (1815–1864).
This word in other languages
Common misspellings
Also misspelled as: bboolean,bolean,boloean,booelan,boolaen,booleann,boolena,boollean,obolean
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of Boolean - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.
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 “Boolean”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is B-O-O-L-E-A-N - every other letter order is a misspelling in standard orthography.
- Say it as /ˈbuːl.i.ən/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “Boleyn” - see the side-by-side comparison. Boolean vs Boleyn
- 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.