OSA
noun, adjective
OSA is spelled O-S-A: 3 letters. It appears about once in every 2 million words in written English, the 38,863rd most frequent word form (wordfreq, 2021 data). As a noun, OSA means “Initialism of obstructive sleep apnea” (English Wiktionary, September 2026). The plural of OSA is OSAs.
How many letters and syllables are in OSA?
| Letters | 3: O-S-A |
|---|---|
| In writing | about once in every 2 million words; the 38,863rd most frequent word form |
| Wrong spellings searched | none measured in search |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How common is OSA?
OSA appears about once in every 2 million words in written English, the 38,863rd 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).
Forms of OSA
- OSAs plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does OSA mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
Initialism of obstructive sleep apnea.
- 2
Initialism of osteosarcoma.
- 3
Initialism of on-shelf availability.
adjective
- 1
Initialism of opposite-sex attracted.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
OSA in Spanish, French, German and Portuguese
In the sense obstructive sleep apnea:
| Language | Words |
|---|---|
| French | AOS |
| Spanish | AOS |
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 OSA come from?
Abbreviation.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).