n. 1 any large non-poisonous snake from tropical America esp. of the genus Boa, which kills its prey by crushing and suffocating it in its coils. 2 any snake which is similar in appearance, such as Old World pythons. 3 a long thin stole made of feathers or fur. boa constrictor a large snake, Boa constrictor, native to tropical America and the West Indies, which crushes its prey.
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