Keywords: open, opening, start, begin, beginning, commence, commencement
Sign Definition
As a Noun
                                            1.  The first part of an activity. English = start, beginning.
                                          
                                          
                                        
                                            2.  The first part of a book or a film. English = opening, beginning.
                                          
                                          
                                        
                                            3.  The start of a large and important activity, or the official announcement of when a new product is made available to the public. English = opening, launch.
                                          
                                          
                                        As a Verb or Adjective
                                            1.  To do something which is the first part of an activity, or the first part of a text (such as a book or a film). English = start, begin, open.
                                          
                                          
                                        
                                            2.  To move something, such as a door or a lid on a box, so that it no longer covers a hole or a gap; to move, remove, or cut part of a thing such as a cupboard, container, or letter so that you can take out what is inside. English = open.
                                          
                                          
                                        
                                            3.  To tell people at a special ceremony that a new product is available to the public. English = launch.