OOB
noun, adjective
OOB is spelled O-O-B: 3 letters. It appears about once in every 12 million words in written English, the 105,204th most frequent word form (wordfreq, 2021 data). As a noun, OOB means “Abbreviation of Open(ing) Of Business, usually referring to a time frame margin” (English Wiktionary, September 2026).
How many letters and syllables are in OOB?
| Letters | 3: O-O-B |
|---|---|
| In writing | about once in every 12 million words; the 105,204th 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 OOB?
OOB appears about once in every 12 million words in written English, the 105,204th 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).
What does OOB mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
Abbreviation of Open(ing) Of Business, usually referring to a time frame margin.
...between OOB January 1, 2007 and COB December 31, 2007.
- 2
Initialism of offset overhand bend.
- 3
Initialism of out-of-body.
- 4
Initialism of off-off-Broadway.
adjective
- 1
out of box
adjective
- 1
Initialism of out-of-band.
- 2
Initialism of out of bed.
- 3
Initialism of out of bounds.
- 4
Initialism of out of the box.
- 5
Initialism of out-of-body.
- 6
Initialism of off-off-Broadway.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).