noun. An old man.

noun. A man with a gray beard; an old man.

noun. Same as bellarmine.

noun. The common sertularian hydroid polyp which infests oyster-beds, Sertularia argentea. When it forms patches on the shells, the oysters are said to hair up.

Having a gray beard; old.

noun. An old man.

noun. Alternative spelling of greybeard.

noun. a man who is very old