How to map a host name in one domain to host name of another domain?

[sam]

I have a host in my primary domain east.xxx.org.
I want to map this east.xxx.org to www.myxyzdomain.com . So that people can
use www.myxyzdomain.com instead of east.xxx.org. Where abcddomain.com is
registered in the comTLD with NS pointing to ns1.xxx.org and ns2.xxx.org.

Is it possible to do that above? What command in the ISC DNS-Bind 9.2.1
should I use to achieve the above scenario.?
I have something like this in xxx.org zone file

            east.xxx.org 600 A 111.222.333.444


Appreciate any help

Sam