I think the term has been taken on two meanings; yes it does mean personality inparticular your base (innermost) emotions and feelings. It is also commonly (and quite differently) accredited to meaning the part of ones self that survives death. This could or could not include personality although I am not sure what would be left it didn't. Its existence is a matter of personel belief - which I will leave for others to debate. Just to confuse matters though, emotions and feelings are of course derived from physical conditions in the brain.