1
                    
        a
    
          
                                          
              
          
                                                      : a break in or as if in a material object : gap                                      
              
                             
the weedy hiatus between the town and the railroad—
Willa Cather
                                       the hiatus between the theory and the practice of the party—
J. G. Colton
                         
                
                    
        b
    
          
                                biology 
                                  
              
          
                                                      : a gap or passage in an anatomical part or organ                                      
                
                    
2
                    
        a
    
          
                                          
              
          
                                                      : an interruption in time or continuity : break                                      
                
                                
            especially                
          
                                                      : a period when something (such as a program or activity) is suspended or interrupted                                       
              
                             
            after a 5-year hiatus from writing    
                                       a summer hiatus    
                         
            
        b
    
          
                                          
              
          
                                                      : the occurrence of two vowel sounds without pause or intervening consonantal sound                                      
                
                    
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  Merriam-Webster unabridged




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