messed up my listener :(

[jennifer2007]

I'm confused dear where do I add it? in spfile or listener.ora or
tnsnames.ora


ORA-00132: syntax error or unresolved network name 'string'
Cause: Listener address has syntax error or cannot be resolved.
Action: If a network name is specified, check that it corresponds to an entry in TNSNAMES.ORA or other address repository as configured for your system. Make sure that the entry is syntactically correct.

I believe the network name is specified, and this this my tnsnames.ora
entry:

ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = ora_db)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl.world)
)
)


I believe i deleted some lines here that specified my LOCAL_LISTENER=LISTENER_ORCL and
I dont know how to return it back and what is the right syntax. Can u help me with the syntax pls

Thanks