fantasia
noun
                                                                                                                            
                                                            fan·ta·sia
                    
                                                                                                              
                                                                                                                                  fan-ˈtā-zhə  
                                                                                                                              
            -zhē-ə,
                                                                                                                              -zē-ə;
                                                                                                                              ˌfan-tə-ˈzē-ə
                                                      
                                                          1
                    
                                          
              
          
                                                      : a free usually instrumental composition not in strict form                                      
                
                    
2
                    
        a
    
          
                                          
              
          
                                                      : a work (such as a poem or play) in which the author's fancy roves unrestricted                                      
                
                    
        b
    
          
                                          
              
          
                                                      : something possessing grotesque, bizarre, or unreal qualities                                      
                
                    
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  Merriam-Webster unabridged




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