A circular ornamental headdress worn by a monarch as a symbol of authority, usually made of or decorated with precious metals and jewels. The top or highest part of something. A British coin with a face value of five shillings or 25 pence, now minted only for commemorative purposes. A paper size, now standardized at 384 × 504 mm. Ceremonially place a crown on the head of (someone) in order to invest them as a monarch. Be the triumphant culmination of (an effort or endeavor, especially a prolonged one). (of a baby's head during labor) fully appear in the vaginal opening prior to emerging.