Learner's definition of INFECT
to cause (someone or something) to become sick or affected by disease
If you're sick you should stay home to avoid infecting other people in the office.
The virus has infected many people.
They were unable to prevent bacteria from infecting the wound.
— often used as (be) infected
to cause (someone) to feel an emotion
— usually + with
of an emotion
to spread to (other people)
of a computer virus
to cause (a computer or computer file) to stop working as it should