1.To unfold and spread out the wings, like a mantle; said of hawks. Also used figuratively. "Ne is there hawk which mantleth on her perch." "Or tend his sparhawk mantling in her mew." "My frail fancy fed with full delight. Doth bathe in bliss, and mantleth most at ease."
2.To spread out; said of wings. "The swan, with arched neck Between her white wings mantling proudly, rows."
3.To spread over the surface as a covering; to overspread; as, the scum mantled on the pool. "Though mantled in her cheek the blood."
4.To gather, assume, or take on, a covering, as froth, scum, etc. "There is a sort of men whose visages Do cream and mantle like a standing pond." "Nor bowl of wassail mantle warm."