Definition of serendipity noun from the Oxford Advanced American Dictionary

 

serendipity

 noun
noun
NAmE//ˌsɛrənˈdɪpət̮i//
 
[uncountable]
 
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the fact of something interesting or pleasant happening by chance Meeting her like that, and there of all places, was true serendipity!
serendipitous
 
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NAmE//ˌsɛrənˈdɪpət̮əs//
 
adjective serendipitous discoveries
See the Oxford Advanced Learner's Dictionary entry: serendipity