flat out
/ˌflæt ˈaʊt/
"flat-out" is a 7-letter English headword indexed on PlainSpell.
The verdict
“flat out” is uncommon English (outside the top frequency list), classed as an adjective. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 8
- letters
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Used other than figuratively or idiomatically: see flat, out.
Corpus desk
Index EN-flat-out · flat out · English
flat out · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-LONG 8 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-THIN "F" thin
- PHOTO-UNK Peer pending
Read with this headword: Spelling guide for this pattern
Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.
| Property | Value |
|---|---|
| Headword | flat out |
| Language | English |
| Part of speech | Adjective |
| IPA | /ˌflæt ˈaʊt/ |
| Letters | 8 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “flat out” in English
Rare enough to double-check
flat out is uncommon English outside the top frequency list, classed as anadjective, transcribed /ˌflæt ˈaʊt/. Rarity is why readers land here mid-draft. 4 senses are on record.
No misspelling variants are generated for flat out in our index, which points to an orthography that plays by predictable English rules. Our confusable-pair dataset has no match for it, which usually means its spelling is distinct enough that readers don't reach for a similar-looking word instead.
This entry carries no recorded etymology, so any spelling logic here comes from how the word's sounds map to letters, not a documented origin story. The correct English form is flat out, spelled F-L-A-T- -O-U-T.
Definition
- 1Used other than figuratively or idiomatically: see flat, out.
- 2Complete, total, downright.
- 3Very busy.
- 4Lazy, sleeping.
Recorded use
Wiktionary examplesThese source excerpts show how flat out appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
So many of them took pictures, of themselves and of me, that we ran flat out of black-and-white film the second day out, and there wasn′t a Queen Mary necktie to be had in the shops after we left the port.
Avoid Flat-Out Opposites The slob vs. the neatnik. The artist vs. the precision-freak. The freethinker vs. the tightass. Liberal vs. conservative. Jock vs. nerd. David vs. Goliath. Good vs. evil. Beauty and the Beast. Jekyll^([sic]) and Hyde.
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.