# accession

> English word · Noun · IPA /ækˈsɛʃ.ən/ · frequency rank #17,067

## Definitions
1. A coming to; the act of acceding and becoming joined.
2. Increase by something added; that which is added; augmentation from without.
3. Increase by something added; that which is added; augmentation from without.
4. A mode of acquiring property, by which the owner of a corporeal substance which receives an addition by growth, or by labor, has a right to the part or thing added, or the improvement (provided the thing is not changed into a different species).
5. The act by which one power becomes party to engagements already in force between other powers.
6. The act of coming to or reaching a throne, an office, or dignity.
7. The invasion, approach, or commencement of a disease; a fit or paroxysm.
8. Agreement.
9. Access; admittance.
10. A group of plants of the same species collected at a single location, often held in genebanks.
11. Complicity, concurrence or assent in some action.

## Etymology
Ultimately from Latin accessiō(n), from accēdō (English accede). Cognate to French accession. First attested in 1646.

## Easily confused with
- **ascension** (https://plainspell.com/en/vs/accession-vs-ascension)
- **accessing** (https://plainspell.com/en/vs/accessing-vs-accession)

## Common misspellings (10)
`accesion`, `accesison`, `accessino`, `accessionn`, `accessoin`, `accestion`, `accsesion`, `acecssion`, `acession`, `cacession`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/accession