Definition of "Birth" :

noun: the event of being born

"They celebrated the birth of their first child."

noun: a baby born; an offspring

"The overall rate of incidence of Down's syndrome is one in every 800 births."

noun: the process of giving birth

noun: the kinship relation of an offspring to the parents

noun: the time when something begins (especially life)

"They divorced after the birth of the child."

verb: cause to be born