O

+**O** is the fifteenth letter of the [Latin alphabet](/wiki/latin-alphabet), a vocalic form echoing ancient, rounded origins. It widely symbolizes [wholeness](/wiki/wholeness), the perfect [circle](/wiki/circle), or the profound emptiness of zero, embodying both a sound and a fundamental shape.

+## See also

+- [Alphabet](/wiki/alphabet)

+- [Vowel](/wiki/vowel)

+- [Zero](/wiki/zero)