To make holy; to purify from sin;
to cleanse from corruption;
to separate or set apart for the service and worship of God.    

Also: Holy; physically and
blameless; separate,
or set apart for the
service and 
of God

Sanctify them through thy truth:
thy word is truth. 
As thou hast sent me into the world,
even so have I also sent them
into the world. 
And for their sakes I sanctify myself,
that they also might be sanctified
through the truth.

John 17:17-19
Jesus was the pure and
sinless Holy Lamb of God;
He did not need to be purified from sin, or cleansed
from corruption,
as we do.