All 6 Uses

atrium
in
1st to Die, by Patterson
(Auto-generated)

All I know is that barely twelve minutes after Jacobi's call, my ten-year-old Bronco screeched to a halt in front of the hotel's atrium entrance.†
p. 19.4
The high glass atrium lobby, gold columns rising to the third floor.†
p. 30.1
The driving beat of "La Bamba" jolted through the brightly lit atrium of the Rock and Roll Hall of Fame in Cleveland.†
p. 174.2 *
He went down a wide, well-lit corridor off the atrium.†
p. 175.7
McBride walked us up to the second floor and through an eerie, empty atrium devoid of pedestrian traffic to a men's room blocked off by crisscrossing yellow crime tape and cops.†
p. 186.2
Everyone congregated in the entrance atrium.†
p. 188.1

Definitions:

(1) (atrium as in: atrium of the building)
a central open space in a building -- often a large skylit hall near the entrance

In ancient Roman houses and early Christian churches, an atrium was an open courtyard. In many modern buildings, it is an indoor space that may include plants, water features, and balconies or walkways to other rooms.
(2) (atrium as in: right atrium of the heart)
chamber from which blood enters the heart
(3) (meaning too rare to warrant focus)
Much less commonly, atrium can refer to anatomical structures other than the heart.