bf

noun

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

"bf" is a 2-letter English headword indexed on PlainSpell.

The verdict

“bf” is a regularly-used English word, ranked #9,707 in English word frequency and used as a noun.

#9,707
frequency rank, English
2
letters
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Initialism of boyfriend.

Visual similarity to commonly confused words

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

bf vs by
50% similar
bf vs bi
50% similar
bf vs BS
0% similar

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

Key facts for bf
PropertyValue
Headwordbf
LanguageEnglish
Part of speechNoun
Letters2
Frequency rank#9,707
Misspellings tracked0
Confusable pairs20
SourceWiktionary (kaikki.org)

Where “bf” 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). bf 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 English entry for bf is 2 letters long, classified as a noun. Corpus data places it at rank #9,707 in overall English word frequency, indicating it appears regularly in written and spoken text. Wiktionary records 4 distinct senses for this headword, so context determines which meaning a reader should apply.

We couldn't generate a plausible misspelling set for bf, and the word's spelling is regular enough that our generator found nothing worth flagging. It also participates in 20 confusable-pair relationships, "by", "bi", "BS", and more, since the words sound or look close enough that writers reach for the wrong one mid-sentence.

Wiktionary doesn't record an etymology for this headword, leaving phoneme-to-grapheme mapping as the best guide to its spelling rather than a borrowing history. The correct English form is bf, spelled B-F.

Definition

  1. 1
    Initialism of boyfriend.
  2. 2
    Initialism of best friend.
  3. 3
    Initialism of boldface.
  4. 4
    Initialism of breastfeeding.

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 "bf"?
"bf" is spelled B-F.
What does "bf" mean?
As a noun, "bf" means: Initialism of boyfriend.
What words are commonly confused with "bf"?
"bf" is commonly confused with "by", "bi", "BS". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
What language does "bf" come from?
"bf" is a English word. PlainSpell's reference spans five languages -- English, Spanish, Portuguese, French, and German -- with definitions, pronunciations, and spelling data for each.
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 “bf”

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

  • The one correct English spelling is B-F - every other letter order is a misspelling in standard orthography.
  • Don't mix it up with “by” - see the side-by-side comparison. bf vs by
  • 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.

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

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