Noun
The birth of an infant prior to the completion of its prenatal development.
(medicine) Childbirth occurring earlier than 37 completed weeks of gestation, but later than 20th week, which is regarded a miscarriage.
Source: en.wiktionary.orgPerhaps, if prematurely we dismiss ourselves from this world, all may even have to be suffered through again - the premature birth may not contribute to the production of another being, which must be begun again from the beginning. Florence Nightingale