adjunction
"adjunction" is a 10-letter English headword indexed on PlainSpell.
The verdict
“adjunction” is uncommon English (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.
- Unranked
- below top-frequency English
- 10
- letters
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - The act of joining; the thing joined or added.
Corpus desk
Index EN-adjunction · adjunction · English
adjunction · unranked · 0 variants · 0 confusables
- FREQ-UNRANKED Unranked
- LEN-MEGA 10 letters
- VOW-4 4 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-THIN "A" 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 | adjunction |
| Language | English |
| Part of speech | Noun |
| Letters | 10 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “adjunction” in English
Rare enough to double-check
adjunction is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. 6 senses are on record.
adjunction doesn't appear in our generated misspelling index, a straightforward case of a spelling with little room for common typos. Our confusable-pair dataset has no match for it, since no other headword is close enough in sound or shape to pair with it.
Etymologically, the entry records: From Latin adjunctio, from adjungere: compare French adjonction, and see adjunct. The correct English form is adjunction, spelled A-D-J-U-N-C-T-I-O-N.
Definition
- 1The act of joining; the thing joined or added.
- 2The joining of personal property owned by one to that owned by another.
- 3The process of adjoining elements to an algebraic structure (usually a ring or field); the result of such a process.
- 4A relationship between a pair of categories that makes the pair, in a weak sense, equivalent.
- 5A natural isomorphism between a pair of functors satisfying certain conditions, whose existence implies a close relationship between the functors and between their (co)domains; the natural isomorphism, functors, and their (co)domains thought of as a single object.
- 6A natural isomorphism between a pair of functors satisfying certain conditions, whose existence implies a close relationship between the functors and between their (co)domains; the natural isomorphism, functors, and their (co)domains thought of as a single object.
Recorded use
Wiktionary examplesThese source excerpts show how adjunction appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
The ring obtained after the adjunction of the elements a,b and y to the ring R may be denoted R#91;a,b,y#93;.
The field adjunction #92;mathbb#123;Q#125;(#92;pi) can be obtained from #92;mathbb#123;Q#125; by adjoining #92;pi to #92;mathbb#123;Q#125;.
Etymology
From Latin adjunctio, from adjungere: compare French adjonction, and see adjunct.
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.