Childish (8)
'childish' is the definition.
(similar in meaning)
This is the entire clue.
(Other definitions for immature that I've seen before include "Not fully ripe or developed" , "behaviour of child" , "Lacking in development" , "Not yet fully grown or developed" , "Young" .)
'childish' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for juvenile that I've seen before include "Of young people" , "Young or childish, sometimes delinquent" , "Adolescent" , "Minor" , "Childish; youngster" .)
'childish' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for puerile that I've seen before include "Childishly stupid" , "Childish, silly, trivial" , "Childish, immature" , "Infantile" , "Babyish" .)
'childish' is the definition.
(I know that childish can be written as infantile)
This is the entire clue.
(Other definitions for infantile that I've seen before include "in early stage of development" , "Inflate in childish way" , "Babyish" , "for kids" .)