American English

Definition of hedgehog noun from the Oxford Advanced American Dictionary



, NAmE//ˈhɛdʒhɑɡ//
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a small, brown, European animal with stiff parts like needles (calledspine) covering its back. Hedgehogs are nocturnal (= active mostly at night) and can roll into a ball to defend themselves when they are attacked.
See the Oxford Advanced Learner's Dictionary entry: hedgehog