Definitions

1. adjective

having a bad reputation; known or considered to be very bad or unpleasant

“The infamous gangster was arrested for his crimes.”

2. noun

a person or thing that is famous for being bad or unpleasant

“The city’s infamous slums were a major concern for the government.”

3. adverb

in a way that is very bad or unpleasant

“The film was infamous for its graphic violence.”