noun
atrium
AY-tree-uhm
noun
1
A large open central hall or courtyard in a building, often glass-roofed.
"The hotel lobby featured a soaring glass atrium."
2
(anatomy) One of the upper chambers of the heart that receives blood before it passes to a ventricle.
"The right atrium receives blood returning from the body."
How to Use Atrium
Learner’s notesIn plain EnglishEither a grand open hall in a building, or one of the heart's upper chambers.
Common pairings
glass atrium
left atrium
right atrium
Word Forms
atria plural, atriums plural
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The hotel lobby featured a soaring glass _____.
Etymology
From Latin atrium ("entrance hall"), borrowed from Etruscan.