Possibly but not an immortal one!
The usual notion of the word is tied up with a concept of personality and what is distinctly
"You"
There are enough cases of people who have suffered great trauma - both physical and psychological that no one recognised them as the same person any more - that part of them that defined them as who they were changed.
Phineas Gage was one of the first examples
http://www.deakin.edu.au/hmnbs/psychology/gage page/Pgstory.php
He survived a spike through his head but his friends said he was "no longer Gage"