Definition of stadium
plural stadia
play
\-dē-ə\
or stadiums
1 a
:any of various ancient Greek units of length ranging in value from 607 to 738 feet (about 185 to 225 meters)
b
:an ancient Roman unit of length equal to 607 feet (185 meters)
2 a
:a course for footraces in ancient Greece originally one stadium in length
b
:a tiered structure with seats for spectators surrounding an ancient Greek running track
c
:a large usually roofless building with tiers of seats for spectators at sports events
3
[New Latin, from Latin]
:a stage in a life history;
especially
:one between successive molts of an insect 
