Definition of nativities:
(n) :
(also with capital initial) The birth of Jesus.
(n) :
(Christianity, also with capital initial) The festival celebrating the birth of Jesus, Christmas Day; the festival celebrating the birth of the Virgin Mary or the birth of Saint John the Baptist.
(n) :
(now dated) Someone's birth; the place, time and circumstances of a birth.
(n) :
(astrology) Someone's birth considered as a means of astrology; a horoscope associated with a person's birth.
(n) :
(also with capital initial) A set of figurines used to create a nativity scene.
(n) :
Place of origin; place to which a species is native.