1. the people who read a particular publication, author, or type of material
2. the number of people who read a particular publication

Examples

• The magazine has a readership of over two million people.
• The newspaper’s readership has declined in recent years.
• Young adult novels have attracted a diverse readership.
• The blog’s readership grew rapidly after going viral.
• Publishers study their readership to understand market trends.
• The author was surprised by her international readership.
• Online publications can track their readership more precisely than print media.