Born prematurely; being the product of a miscarriage, stillborn. Also figurative and in figurative contexts.

Born lifeless; dead at birth; abortive. Also, formerly, born alive but not breathing.

Occurring or accomplished with one or both feet foremost.

Of a woman's labour or an infant's birth: occurring before full term; (of an infant) born before full term, esp. (in recent use) before 37 weeks of…

Causing abortion; resulting in the premature termination of pregnancy.

Born with insufficient development.

Obstetrics. Of an infant: born after a pregnancy lasting significantly longer than normal; post-term. Of labour or birth: occurring after such a…

(Of a pregnancy) lasting significantly longer than normal; characterized by or (of an infant) born after such a pregnancy. Cf. postmature, adj.

Born or occurring before full term, spec. before 37 weeks of gestation; of or relating to such a baby. Cf. premature, adj. 2b.

designating a child who has a heartbeat or shows other signs of life upon delivery but dies or nearly dies shortly after.

Of a baby: premature.