1.(Zool.) A nestling of a pigeon or other similar bird, esp. when very fat and not fully fledged.
2.A person of a short, fat figure. "Gorgonious sits abdominous and wan, Like a fat squab upon a Chinese fan."
3.A thickly stuffed cushion; especially, one used for the seat of a sofa, couch, or chair; also, a sofa. "Punching the squab of chairs and sofas." "On her large squab you find her spread."
