American English

Definition of seasick adjective from the Oxford Advanced American Dictionary

 

seasick

 adjective
adjective
NAmE//ˈsisɪk//
 
[not usually before noun]
 
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feeling sick or wanting to vomit when you are traveling on a boat or ship to be/feel/get seasick
seasickness
 
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noun [uncountable] to suffer from seasickness
See the Oxford Advanced Learner's Dictionary entry: seasick