Definition - What does Mailing List mean?
A mailing list is a compilation of email addresses that are used to send email to multiple users simultaneously. Rather than individually sending an email to each user, mailing lists send email to specific user groups through a single email message.
A mailing list is also known as an email list or electronic mailing list.
Techopedia explains Mailing List
A mailing list is usually composed of email addresses of subscribers to a website/service/business and/or emails collected through offline or manual means. It usually consists of only the names and email addresses of individuals. Mailing lists are generally used as a means to share content, news and any product- or service-related information with subscribers.
A mailing list address sends admin-specified email messages and can be used to send email to all subscribers in the list by other users.
Spammers and bulk email senders also maintain mailing lists to instantly send bulk emails to a large number of end users.