- Christmas Day, the 25th of December.
- the season surrounding Christmas Day
- A male or female given name, cognate to Noel or Noelle
Declension of Nollaig
Forms with the definite article
- cárta Nollag (“Christmas card”)
- Daidí na Nollag (“Father Christmas, Santa Claus”)
- Mí na Nollag (“December”)