PUERIL'ITY, noun [Latin puerilitas, from puer, a boy.] 1. Childishness; boyishness; the manners or actions of a boy; that which is trifling. 2. In discourse, a thought or expression which is flat, insipid or childish.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI