The hand that did it was very young, very immature; but it had the youth and the immaturity of a Master.

Of the former class the chief cause is, in a word, immaturity.

So long as we fall short of the state of unity we are in the stage of immaturity.

The perpetuation of the species must not depend upon the license of immaturity.

It is due to ignorance, immaturity, and neglect, like the naughtinesses of children.

What on earth were you saying about Wordsworth's youth and immaturity?

At any rate, the word used is to convey an impression of immaturity.

He was a young man of eighteen, and had some of the weaknesses that belong to immaturity of age.

Was she overcome by the despair of the artist-soul struggling in its immaturity?

One could hardly ask for a more perfect definition of immaturity.