Definition of expectoration noun from the Oxford Advanced Learner's Dictionary

 

expectoration

 noun
noun
BrE BrE//ɪkˌspektəˈreɪʃn//
 
; NAmE NAmE//ɪkˌspektəˈreɪʃn//
 
[uncountable](formal)
 
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the action of coughing and making phlegm come up from your lungs so you can spit it out