/pyooh'euh ril"i tee, pyoo ril"-/ , n. , pl. puerilities .
1. the state or quality of being a child.
2. the quality of being puerile; childish foolishness or triviality.
3. a puerile act, idea, remark, etc.: an inexcusable puerility.
[ 1425-75; late ME puerilitas. See PUERILE, -ITY ]