pre·ma·ture 
(pr
ē′m
ə-ty
r
, -t
r
, -ch
r
)
adj.1. Occurring, growing, or existing before the customary, correct, or assigned time; uncommonly or unexpectedly early: a premature end.
2. Born after a gestation period of less than the normal time: a premature infant.
[Middle English, ripe, from Latin praemātūrus, ripe too early : prae-, pre- + mātūrus, ripe; see mā-1 in the Appendix of Indo-European roots.]
pre′ma·turely adv.
pre′ma·tureness, pre′ma·turi·ty n.