Drop an index.
  
  Syntax:
DROP INDEX [schema.]index [FORCE]
FORCE can be used to drop domain indexes that are marked
    as  IN_PROGRESS or are reporting errors.
  
"Anything you build on a large scale or with intense passion invites chaos" ~ Francis Ford Coppola 
Related Oracle Commands:
INDEX - CREATE INDEX
  INDEX - ALTER INDEX 
 DBA_INDEXES            ALL_INDEXES              USER_INDEXES 
                                                                
     INDEX_HISTOGRAM 
                                                                
     INDEX_STATS 
 
  DBA_INDEXTYPES           ALL_INDEXTYPES           USER_INDEXTYPES 
 
  DBA_INDEXTYPE_OPERATORS  ALL_INDEXTYPE_OPERATORS  USER_INDEXTYPE_OPERATORS 
 
  DBA_IND_COLUMNS          ALL_IND_COLUMNS        USER_IND_COLUMNS 
 
  DBA_IND_EXPRESSIONS      ALL_IND_EXPRESSIONS    USER_IND_EXPRESSIONS 
 
  DBA_IND_PARTITIONS       ALL_IND_PARTITIONS     USER_IND_PARTITIONS 
 
 DBA_IND_SUBPARTITIONS    ALL_IND_SUBPARTITIONS  USER_IND_SUBPARTITIONS