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FOS

/fɑs/noun

FOS is a noun meaning “Initialism of freedom of speech” (English Wiktionary, September 2026). It is spelled F-O-S and has one syllable, and it appears about once in every 2 million words in written English (wordfreq, 2021 data).

What does FOS mean?

noun

  1. 1

    Initialism of freedom of speech.

noun

as FOs
  1. 1

    plural of FO (a form of FO)

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

How do you pronounce FOS?

  • UK /fɒs/
  • UK /fəs/
  • US /fɑs/
  • US /ˌfɑs/

FOS has one syllable (counted from the pronunciation).

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

Forms of FOS

  • fos-

Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).

How common is FOS?

FOS appears about once in every 2 million words in written English, the 45,363rd 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).