(1):

(n.) The iron head of a tilting spear; a coronel.

(2):

(n.) An ornamental or honorary headdress, having the shape and character of a crown; particularly, a crown worn as the mark of high rank lower than sovereignty. The word is used by Shakespeare to denote also a kingly crown.

(3):

(n.) The upper part of a horse's hoof, where the horn terminates in skin.