atrium | sense examples, Usage and Definition from wordnet dictionary online

Noun atrium has 2 senses

atrium - any chamber that is connected to other chambers or passageways (especially one of the two upper chambers of the heart)
--₁ is a kind of chamber
--₁ has particulars: atrium cordis, atrium of the heart
atrium - the central area in a building; open to the sky
--₂ is a kind of court, courtyard

,