Definition of think noun from the Oxford Advanced American Dictionary

 

think

 noun
noun
NAmE//θɪŋk//
 
[singular]
 
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Idioms
have a think (about something)(informal)
 
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to think carefully about something in order to make a decision about it I'll have a think and let you know tomorrow.
you've got another think coming(informal)
 
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used to tell someone that they are wrong about something and must change their plans or opinions If you think I'm going to pay all your bills you've got another think coming.
See the Oxford Advanced Learner's Dictionary entry: think