a large structure for open-air sports or entertainments
"The massive stadium filled to capacity as fans arrived early to watch the championship game under the open sky."
A venue where sporting events are held.
"The entire stadium stood silent as the home team took the field for the opening kickoff."
In plain English: A stadium is a huge open-air arena with tiered seating where large crowds gather to watch sports events or concerts.
"We bought tickets to watch the game at the local stadium."
Usage: Use stadium to describe large, open-air venues specifically designed for major sports and concerts rather than smaller local fields or indoor arenas. Avoid confusing it with similar terms like arena by noting that stadiums typically feature a vast seating capacity surrounding the playing surface.
The English word stadium comes from the Ancient Greek stádion, which originally referred to a specific measure of length or running track at Olympia rather than just any athletic venue. It entered modern usage through Latin as stadium, where it retained its meaning of a race course before evolving into the name for large sports arenas today.