english
                    
                    
                    
                        1
                           general:: 
                           Also, still as a mouse. Silent, without noise, as in She sneaked into the house, quiet as a mouse, or When he heard the news he was still as a mouse. The first of these similes dates from the mid-1500s, the second from the 1300s.
                           
                           
                           
                           
                        
    
                       
                    
                        
                        
                        
                    
 
                    
                        American Heritage Idioms
                    
                    
                    
                        2
                           general:: 
                           Phrase(s): *quiet as a (church) mouse [and] *quiet as the grave  very quiet. (*Also: as ~.)  •  You’d better be as quiet as a mouse while Grandma takes her nap so you won’t wake her up.  •  This town is quiet as the grave now that the factories have closed.
                           
                           
                           
                           
                        
    
                       
                    
                        
                        
                        
                    
 
                    
                        McGrawhill's American Idioms And Phrasal Verbs