Female (4)
'female' is the definition.
(I know that woman is a type of female)
This is all the clue.
(Other definitions for woman that I've seen before include "See 16" , "With 1a [OLD], one's rather timid" , "Lady" , "With 1a [NEW] a freedom fighter" , "person not going on stag-night" .)
'female' is the definition.
(I know that girl is a type of adult female)
This is the entire clue.
(Other definitions for girl that I've seen before include "Young woman" , "Miss" , "Female child" , "One of 8 [LASSES]" , "See 5" .)
'female' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for feminine that I've seen before include "Opposite of masculine" , "Womanlike" , "for the ladies?" , "Womanly" , "Female" .)