To give milk to a young animal or child from the breast or udder. The mother cat will suckle her kittens until they are old enough to eat solid food.
To nurture, sustain, or support (someone or something) in a way likened to feeding with milk. Government subsidies continued to suckle the industry long after it should have stood on its own.
To draw milk from the breast or udder; to nurse. The newborn foal suckled eagerly from its mother.