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Definition of O noun from the Oxford Advanced Learner's Dictionary

O

noun
 
/əʊ/
 
/əʊ/
(also o)
(plural Os, O’s, o’s
 
/əʊz/
 
/əʊz/
)
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  1. [countable, uncountable] the 15th letter of the English alphabet
    • ‘Orange’ begins with (an) O/‘O’.
  2. used to mean ‘zero’ when saying phone numbers, etc.
    • My number is six o double three (= 6033).
    3. see also O grade, O level
See O in the Oxford Advanced American Dictionary
Check pronunciation: O

Nearby words

sunflower
noun
 
 
From the Topic
Plants and trees
B2
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