Backus-Naur form

Spelling & Dictionary Insight

The English entry for Backus-Naur form is 16 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /bækəs naʊə fɔːm/. It sits outside the most-frequent rank tiers, which is often why uncommon words generate more spelling variants per reader. The dominant gloss from Wiktionary reads: "A formal notation for context-free grammars.".

No misspelling variants are generated for Backus-Naur form in our index, suggesting the orthography follows predictable English patterns. It is not paired with a close-neighbour confusable in our dataset, which tends to mean the word is visually distinctive enough to stand on its own.

Etymologically, the entry records: From the names of computer science pioneers John Backus and Peter Naur. The notation was developed by Backus in 1959 (as Backus normal form) to describe computer languages, specifically ALGOL 58, and expanded and used by Naur in the ALGOL 60 report (the res… Root origin matters for spelling because borrowed morphemes (Greek, Latin, Old French, Old English) carry their source-language orthographic conventions into modern English, which is why historical etymology is often the cleanest predictor of whether a cluster like "-ough", "-eau", or "-tion" will appear. For readers arriving here from a spelling check, the authoritative guidance is: the correct English form is Backus-Naur form, spelled B-A-C-K-U-S---N-A-U-R- -F-O-R-M, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.