Onna (女) means "woman" or "female." It refers to an adult female person. Similar to "otoko," this word is used to describe gender, differentiate between males and females, or to form compound words like "onnanoko" (girl), indicating the female sex. Example: 彼女は女の医者です。(Kanojo wa onna no isha desu.) = She is a female doctor.

成人(せいじん)の女性(じょせい)を指(さ)す言葉(ことば)です。性別(せいべつ)を区別(くべつ)する時(とき)に使(つか)います。例(れい)：彼女(かのじょ)は女(おんな)の医者(いしゃ)です。