Keywords: know well, well-known (familiar), familiar
Sign Definition
As a Verb or Adjective
                                            1.  To recognise someone or something or know about them well because you have seen, heard, or experienced them before. English = know well, (be) well-known, (be) familiar with.
                                          
                                          
                                        Interactive
                                            1.  Used alone in reply to someone who tells you something that is well-known to you already or mentions to you someone well-known to you as if you did not know them.
                                          
                                          
                                         
                  
                      