O, onoun [ C or U ]
uk/əʊ/us/oʊ/plural Os, O's or o'sO, o noun [ C or U ] (LETTER)
the 15th letter of the English alphabet
Thesaurus: synonyms and related words
Letters of alphabets
- A, a
- alphabetic
- B, b
- C, c
- chi
- I, i
- iota
- J, j
- K, k
- kappa
- psi
- Q, q
- R, r
- rho
- S, s
- Y, y
- Z, z
- zed
- zee
- zeta
See more results »
O, o noun [ C or U ] (ZERO)
also o, also oh used in speech to mean zero:
My phone number is three, one, o, five, one, double o (= 3105100).
The year 1705 is usually pronounced seventeen o five.
Thesaurus: synonyms and related words
Numbers: cardinal, including nought & zero
- bn
- eighteen
- eighty
- eleven
- fifty
- five
- fourteen
- giga-
- googol
- googolplex
- hundred
- milliard
- million
- oh
- six
- ten
- thousand
- trillion
- twelve
- uni
See more results »
O, oexclamation
uk/əʊ/us/oʊ/old use or literaryused when talking to someone or something, or expressing something in an emotional or formal way:
O Zeus! Hear my prayer.
Compare
oh exclamation
Thesaurus: synonyms and related words
Linguistics: interjections
- (well) what do you know! idiom
- aiyo
- aw shucks
- awesomesauce
- bam
- bless
- boo
- charming
- good show idiom
- goodness
- heck
- hot dog! idiom
- same to you idiom
- stuff and nonsense idiom
- talk
- voilà
- wake up! idiom
- what an idea! idiom
- what do you mean? idiom
- yes
See more results »