For pronunciation and definitions of お – see 悪, 汚. (This term, お, is an alternative spelling of the above Sino-Japanese terms.)
(The following entries are uncreated: 悪, 汚.)
The hiragana syllable お(o). Its equivalent in katakana is オ(o). It is the fifth syllable in the gojūon order; its position is あ行お段(a-gyō o-dan, “row a, section o”).