Alphabetically listed kanji meanings starting with "O"
- 老old person
- 叟old person
- 耆old person
- 艾old person
- 咫old unit of length
- 婆old woman
- 姥old woman
- 媼old woman
- 嫗old woman
- 媽old woman
- 鶲old world flycatchers
- 禺old world monkey
- 旧old-fashioned
- 舊old-fashioned
- 旧old-time
- 舊old-time
- 兄older brother
- 嫂older brother's wife
- 伯older sibling of par
- 姉older sister
- 茱oleaster
- 萸oleaster
- 兆omen
- 釁omen
- 讖omen
- 省omit
- 略omit
- 畧omit
- 於on
- 但on condition
- 一one
- 壱one
- 弌one
- 孑one
- 壹one
- 逐one by one
- 孑one person
- 片one side
- 朞one year
- 自oneself
- 己oneself
- 唯only
- 只only
- 已only
- 開open
- 啓open
- 擺open
- 攤open
- 闢open
- 闡open
- 昜open
- 柝open
- 叭open mouth
- 呀open mouth
- 披open out
- 灘open sea
- 拓open up
- 動operate
- 営operate
- 操operate