Definition of boredom noun from the Oxford Advanced American Dictionary

 

boredom

 noun
noun
NAmE//ˈbɔrdəm//
 
[uncountable]
 
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the state of feeling bored; the quality of being very boring I started to eat too much out of sheer boredom. Television helps to relieve the boredom of long winter evenings. I noticed her short attention span and low boredom threshold (= she got bored very quickly).
See the Oxford Advanced Learner's Dictionary entry: boredom