CISO
noun
CISO is spelled C-I-S-O: 4 letters. It appears about once in every 15 million words in written English, the 118,441st most frequent word form (wordfreq, 2021 data). As a noun, CISO means “Initialism of chief information security officer” (English Wiktionary, September 2026). The plural of CISO is CISOs.
How many letters and syllables are in CISO?
| Letters | 4: C-I-S-O |
|---|---|
| In writing | about once in every 15 million words; the 118,441st 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 CISO?
CISO appears about once in every 15 million words in written English, the 118,441st 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 CISO
- CISOs plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does CISO mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
Initialism of chief information security officer.
Near-synonyms: CSO, CIO, CTO, CITO
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).