Meaning ofatriumin English

Noun

1. a central room open to the sky
   The hotel features a beautiful atrium with a glass roof.
2. a square hall lit from above; with surrounding rooms
   The ancient building had a large atrium with several doors leading to other rooms.
3. a heart chamber receiving blood from veins
   The atrium of the heart receives oxygen-depleted blood from the veins.
4. a cavity or entrance (in anatomy)
   In anatomy, the atrium refers to the cavity at the entrance of a body organ.