Alphabetically listed kanji meanings starting with "O"
- 營operate
- 敵opponent
- 機opportunity
- 対oppose
- 反oppose
- 抗oppose
- 剌oppose
- 辜oppose
- 對oppose
- 逆oppose
- 恷oppose
- 対opposite
- 對opposite
- 虐oppress
- 或or
- 儻or
- 柑orange
- 萓orange daylily
- 猩orangutan
- 軌orbit
- 躔orbit around
- 鯱orca
- 蘭orchid
- 順order
- 令order
- 秩order
- 序order
- 常ordinary
- 只ordinary
- 庸ordinary
- 粳ordinary rice
- 鉱ore
- 砿ore
- 礦ore
- 鑛ore
- 團organization
- 団organization
- 整organize
- 飭organize
- 撩organize
- 元origin
- 由origin
- 源origin
- 因origin
- 原original
- 剏originate
- 創originate
- 扮ornament
- 筬osa (weaving tool)
- 振oscillate
- 掉oscillate
- 魴oshikiuo (a kind of fish)
- 薇osmund
- 鶚osprey
- 雎osprey
- 駝ostrich
- 鴕ostritch
- 他other
- 佗other
- 它other