Keywords: TTY, telephone typewriter, teletypewriter, teletype
Sign Definition
As a Noun
                                            1.  A device with a typewriter keyboard which sends and receives typed messages over the telephone. English = telephone typewriter, teletypewriter, teletype, TTY.
                                          
                                          
                                        As a Verb or Adjective
                                            1.  To answer a telephone typewriter.
                                          
                                          
                                         
                  
                      