knock out
"knock-out" is a 8-letter English headword indexed on PlainSpell.
The verdict
“knock out” is uncommon English (outside the top frequency list), classed as a verb. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 9
- letters
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - To strike or render unconscious
Corpus desk
Index EN-knock-out · knock out · English
knock out · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-LONG 9 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-THIN "K" 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 | knock out |
| Language | English |
| Part of speech | Verb |
| Letters | 9 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “knock out” in English
Rare enough to double-check
knock out is uncommon English outside the top frequency list, classed as averb. Rarity is why readers land here mid-draft. 15 senses are on record.
No misspelling variants are generated for knock out in our index, and the word's spelling is regular enough that our generator found nothing worth flagging. This headword has no recorded confusable partner, which typically means the spelling is too distinctive to be mistaken for another word.
This entry's etymology isn't recorded, so its spelling is easiest to reason about phoneme by phoneme, absent a documented history. The correct English form is knock out, spelled K-N-O-C-K- -O-U-T.
Definition
- 1To strike or render unconscious
- 2To strike or render unconscious
- 3To strike or render unconscious
- 4To strike or render unconscious
- 5To strike or render unconscious
- 6To strike or render unconscious
- 7To strike or render unconscious
- 8To strike or render unconscious
- 9To strike or render unconscious
- 10To communicate (a message) by knocking.
- 11To complete, especially in haste; knock off.
- 12To lose the scent of hounds in fox-hunting.
- 13To leave college after hours—after half-past ten at night when the doors have been locked.
- 14To obtain or earn (something, often money or food).
- 15To sell.
Recorded use
Wiktionary examplesThese source excerpts show how knock out appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
I accidentally knocked out the glass in my picture frame.
The boxer knocked out his opponent in the third round.
This word in other languages
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.