Nativity
Concise Oxford English Dictionary © 2008 Oxford University Press:
nativity/nəˈtɪvəti/
▶noun (pl. nativities)
- 1 the occasion of a person's birth.
- 2 (usu. the Nativity) the birth of Jesus Christ.
■ the Christian festival of Christ's birth; Christmas.
'Nativity' also found in these Oxford entries:

