amphitheatre (UK), amphitheater (US)
nounmasculine/ɐ̃fiˈtjatɾu/medium
an·fi·te·a·tro
Definition
1. A large, circular or oval open-air building with tiers of seats surrounding a central space, used in ancient Rome for public spectacles. 2. A lecture hall with tiered seating. 3. A natural formation resembling an amphitheatre.
The Colosseum is the most famous Roman amphitheatre.
The professor addressed the students in the packed amphitheatre.
Common collocations
amphitheatrelecture theatrenatural amphitheatre
Etymology
Do latim 'amphitheatrum', do grego 'amphitheatron' (theatron, teatro + amphi, em volta).