Definitions for "CNAME"
records are domain name aliases. The most common use is to have a web-server point one url to another. For example "bestdatasource.com" to " www.bestdatasource.com". It could also be used to point "cutternetworks.com" to " www.bestdatasource.com".
a domain alias entry in the DNS record that points a hostname to another hostname
a method of DNS aliasing