-Send the processes named by PID (or JOBSPEC) the signal SIGSPEC. If
-SIGSPEC is not present, then SIGTERM is assumed. An argument of `-l'
-lists the signal names; if arguments follow `-l' they are assumed to
-be signal numbers for which names should be listed. Kill is a shell
-builtin for two reasons: it allows job IDs to be used instead of
-process IDs, and, if you have reached the limit on processes that
-you can create, you don't have to start a process to kill another one.
+Send a signal to a job.
+
+Send the processes identified by PID or JOBSPEC the signal named by
+SIGSPEC or SIGNUM. If neither SIGSPEC nor SIGNUM is present, then
+SIGTERM is assumed.
+
+Options:
+ -s sig SIG is a signal name
+ -n sig SIG is a signal number
+ -l list the signal names; if arguments follow `-l' they are
+ assumed to be signal numbers for which names should be listed
+
+Kill is a shell builtin for two reasons: it allows job IDs to be used
+instead of process IDs, and allows processes to be killed if the limit
+on processes that you can create is reached.
+
+Exit Status:
+Returns success unless an invalid option is given or an error occurs.