Monotony (15)
'monotony' is the definition.
(thesaurus)
This is the entire clue.
'monotony' is the definition.
(monotony can mean dullness or tedium)
This is the entire clue.
(Other definitions for tedium that I've seen before include "Banality" , "Dullness, monotony" , "boring" , "Boredom with monotony" , "Boredom or dullness" .)