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


sitting duck

BrE BrE//ˌsɪtɪŋ ˈdʌk//
; NAmE NAmE//ˌsɪtɪŋ ˈdʌk//
(also sitting target)
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a person or thing that is easy to attack Its location makes the island a sitting duck for attackers.
See the Oxford Advanced American Dictionary entry: sitting duck