# equivalence

> English word · Noun · IPA /ɪˈkwɪv.ə.ləns/ · frequency rank #23,260

## Definitions
1. The condition of being equivalent or essentially equal.
2. An equivalence relation; ≡; ~
3. The relationship between two propositions that are either both true or both false.
4. The quantity of the combining power of an atom, expressed in hydrogen units; the number of hydrogen atoms can combine with, or be exchanged for; valency.
5. A Boolean operation that is TRUE when both input variables are TRUE or both input variables are FALSE, but otherwise FALSE; the XNOR function.
6. A number in intersection theory. A positive-dimensional variety sometimes behaves formally as if it were a finite number of points; this number is its equivalence.
7. The degree to which a term or text in one language is semantically similar to its translated counterpart.

## Etymology
From French équivalence, from Medieval Latin aequivalentia.

## Easily confused with
- **equivalent** (https://plainspell.com/en/vs/equivalence-vs-equivalent)
- **equivalency** (https://plainspell.com/en/vs/equivalence-vs-equivalency)

## Common misspellings (16)
`eqiuvalence`, `eqquivalence`, `equiavlence`, `equivaelnce`, `equivalance`, `equivalecne`, `equivalencce`, `equivalenec`, `equivalennce`, `equivallence`, `equivalnece`, `equivlaence`, `equivvalence`, `equvialence`, `euqivalence`, `qeuivalence`

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