Definition of stadium
plural stadia
play
\ˈstā-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 
