a long thin fluffy scarf of feathers or fur
"She wrapped her shoulders in a colorful boa for the evening gala."
any of several chiefly tropical constrictors with vestigial hind limbs
"The guide explained that while boas are large, powerful snakes, they lack the functional legs seen in their lizard relatives."
Any of a group of large American snakes, of the genus Boa, subfamily Boinae, or family Boidae, including the boa constrictor and the emperor boa of Mexico.
"The local wildlife guide warned us not to wander too close to the riverbank where a massive boa was sunning itself on a fallen log."