1 infect sb/sth (with sth) (usually passive 通常用于被动语态) to cause sb/sth to have a disease or illness 传染；使感染: We must clean the wound before it becomes infected. 尽快清洗伤口，免得受到感染。Many thousands of people have been infected with the virus. 数以千计的人感染了这种病毒。

2 to make people share a particular feeling or emotion 感受；使受影响: Paul's happiness infected the whole family. 保罗的喜悦感染了全家上下。