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Definition of sitting duck noun from the Oxford Advanced Learner's Dictionary

sitting duck

noun
 
/ˌsɪtɪŋ ˈdʌk/
 
/ˌsɪtɪŋ ˈdʌk/
(also sitting target)
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  1. a person or thing that has no protection against attack
    • Its location makes the island a sitting duck for attackers.
See sitting duck in the Oxford Advanced American Dictionary
trait
noun
 
 
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