1. 到期;期满;失效
When something such as a contract, deadline, or visa expires, it comes to an end or is no longer valid.
e.g. He had lived illegally in the United States for five years after his visitor's visa expired.
在访问签证到期后，他又在美国非法居住了5年。
2. 气绝;死亡;故去
When someone expires, they die.
e.g. He endured excruciating agonies before he finally expired.
在最终离世前他经受了极大的痛苦。