When people rebuild something such as a building or a city, they build it again after it has been damaged or destroyed.
双语例句
例：
They say they will stay to rebuild their homes rather than retreat to refugee camps.
他们说要留下来重建家园而不是撤到难民营中。
例：
The old south grandstand must be rebuilt.
破旧的南看台一定要重建。
2.?[T 及物动词] 重建（组织、制度和生活等）
When people rebuild something such as an institution, a system, or an aspect of their lives, they take action to bring it back to its previous condition.
双语例句
例：
The president's message was that everyone would have to work hard together to rebuild the economy.