flux
/flʌks/noun, verb, adjective
flux is spelled F-L-U-X: 4 letters and one syllable. It appears 3.7 times per million words in written English, the 13,496th most frequent word form (wordfreq, 2021 data). As a noun, flux means “The act of flowing; a continuous moving on or passing by, as of a flowing stream” (English Wiktionary, September 2026). The plural of flux is fluxes.
How many letters and syllables are in flux?
| Letters | 4: F-L-U-X |
|---|---|
| Syllables | 1 (from its American pronunciation) |
| In writing | 3.7 times per million words; the 13,496th most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation and the CMU Pronouncing Dictionary; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is flux?
Flux appears 3.7 times per million words in written English, the 13,496th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce flux?
- /flʌks/
Flux has one syllable (counted from its American pronunciation in the CMU Pronouncing Dictionary).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: En-us-flux.ogg, Wikimedia Commons (author and licence on each file's page).
Forms of flux
- fluxes plural, present, singular, he/she/it
- fluxing participle, present
- fluxed participle, past
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does flux mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
The act of flowing; a continuous moving on or passing by, as of a flowing stream.
- 2
A state of ongoing change.
The schedule is in flux at the moment.
- 3
A chemical agent for cleaning metal prior to soldering or welding.
It is important to use flux when soldering or oxides on the metal will prevent a good bond.
- 4
The rate of transfer of energy (or another physical quantity), especially an electric or magnetic field, through a given surface.
That high a neutron flux would be lethal in seconds.
- 5
archaicA disease which causes diarrhea, especially dysentery.
- 6
archaicDiarrhea or other fluid discharge from the body.
- 7
The state of being liquid through heat; fusion.
verb
- 1
To use flux on.
You have to flux the joint before soldering.
- 2
To melt.
- 3
To flow as a liquid.
adjective
- 1
Flowing; unstable; inconstant; variable.
The flux nature of all things here.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Flux in Spanish, French, German and Portuguese
| Language | Words |
|---|---|
| German | Fluss , Flussmittel |
| Portuguese | fluxo , fundente |
| Spanish | fluxión , fundente , flujo |
| French | décapant , flux |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does flux come from?
From Old French flux, from Latin fluxus (“flow”).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).