Adjective

(en adjective)

Of, or relating to old age.

* {{quote-magazine, year=2013, month=May-June, author= Charles T. Ambrose

, title= Alzheimer’s Disease , volume=101, issue=3, page=200, magazine=(American Scientist) , passage=Similar studies of rats have employed four different intracranial resorbable, slow sustained release systems— […]. Such a slow-release device containing angiogenic factors could be placed on the pia mater covering the cerebral cortex and tested in persons with senile dementia in long term studies.}}

(often, offensive) Exhibiting the deterioration in mind and body often accompanying old age; doddering.

Adjective

(en adjective)

Characteristic of, or pertaining to, a boy or boys; confer : puellile.

Childish; trifling; silly.

* (rfdate) De Quincey:

The French have been notorious through generations for their puerile affectation of Roman forms, models, and historic precedents.

* 1927 , , page 79:

From the table he had received the gout; from the alcove a tendency to convulsions; from the grandeeship a pride so vast and puerile that he seldom heard anything that was said to him and talked to the ceiling in a perpetual monologue; from the exile, oceans of boredom, a boredom so persuasive that it was like pain,—he woke up with it and spent the day with it, and it sat by his bed all night watching his sleep.

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