is used to return to the computer a chunk of memory that was previously reserved for your application via the New command.

Type
   PUserData = ^UserData;
   UserData = Packed Record
      Username:String[36];
      Password:String[40];
{.. more fields here ..}

var
   UserRec=PUserData;

Begin
   New(UserRec);
   UserRec^.Username:='Ozz Nixon';
   UserRec^.Password:=SHA1('MySecret');
{.. more stuff ..}
   // When finished:
   Dispose(UserRec);
End.

Source: Reserved Words

See Also:

new, SYSTEM getmem, SYSTEM freemem.