(a) A headdress, a hat; esp., a small head covering worn under the hood; (b) a priest's close-fitting cap, the coif covering the tonsure; also, any kind of head covering for ecclesiastics; (c) a……

(a) Hailstones falling or fallen in a storm; hail reighnesse, hail shour [OE hagol-scūr], hail storm; storm of hail, tempest of hail; as (so) thik as hail, as closely massed as falling hailstones; (b)……