Abbreviation of 世界博覧会 (World Exposition). Used in contexts like event names, news, or casual conversation.
See also: 世界博覧会
The 2025 World Expo is scheduled to be held in Osaka.
世界博のパビリオンを見て回った。
I toured the pavilions at the world expo.
Abbreviation of 世界博覧会 (World Exposition), formed by taking the first two characters of 世界 (world) and the first character of 博覧会 (exposition).