long since
"long-since" is a 9-letter English headword indexed on PlainSpell.
The verdict
“long since” is outside the top-ranked English vocabulary, used as an adverb - the kind of word writers most often double-check.
- Unranked
- below top-frequency English
- 10
- letters
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Long ago; in the (distant) past.
| Property | Value |
|---|---|
| Headword | long since |
| Language | English |
| Part of speech | Adverb |
| Letters | 10 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Where “long since” sits in English frequency
Spelling & Dictionary Insight
The English entry for long since is 10 letters long, classified as an adverb. 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: "Long ago; in the (distant) past.".
Zero misspellings are on record for long since in our index, a sign its spelling follows regular English conventions. No close-neighbour confusable shows up for this headword in our dataset, since its spelling is unusual enough that it doesn't cluster with a lookalike.
Wiktionary doesn't record an etymology for this headword, so its spelling is easiest to reason about phoneme by phoneme, absent a documented history. The correct English form is long since, spelled L-O-N-G- -S-I-N-C-E.
Definition
- 1Long ago; in the (distant) past.
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Using “long since”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is L-O-N-G- -S-I-N-C-E - every other letter order is a misspelling in standard orthography.
- 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.