Alternative form of ο, the fifteenth letter of the Classical and Modern Greek alphabets, called omicron and (astronomy) used as an abbreviation of omicron in star names.
The fifteenth letter of the English alphabet, called o and written in the Latin script.
intj
Alternative form of oh
noun
(IRC, acronym of) Operator
(acronym of) Object, see SVO
A zero (used in reading out numbers).
The name of the Latin-script letter O/o.
num
The ordinal number fifteenth, derived from this letter of the English alphabet, called o and written in the Latin script.
particle
(nonstandard) alternative form of O (vocative particle)