Keywords: uniformity, standard, mean (average), average
Found 3 variants for this sign (click on video to enlarge):
Sign Definition
As a Noun
                                            1.  The condition in which something is the same over time. English = uniformity.
                                          
                                          
                                        
                                            2.  A state in which everyone or everything behaves or looks the same as everyone or everything else. English = uniformity.
                                          
                                          
                                        
                                            3.  Something which is the same for everyone or is considered to be the correct and acceptable form for everyone (especially regarding the words and signs of a language). English = standard.
                                          
                                          
                                        
                                            4.  In mathematics, the number you get when you add two or more numbers together and divide the total by the number of numbers you added together. English = mean, average.
                                          
                                          
                                        As a Verb or Adjective
                                            1.  To be the same over a period of time and not vary. English = (be) uniform.
                                          
                                          
                                        
                                            2.  To be the same for everyone or to be considered to be the correct and acceptable form for everyone (especially regarding the words and signs of a language). English = (be) standard.
                                          
                                          
                                         
                  
                      