'greybeard' definitions:

Definition of 'greybeard'

From: WordNet
noun
A man who is very old [syn: old man, greybeard, graybeard, Methuselah]
noun
A stoneware drinking jug with a long neck; decorated with a caricature of Cardinal Bellarmine (17th century) [syn: bellarmine, longbeard, long-beard, greybeard]

Definition of 'greybeard'

From: GCIDE
  • greybeard \grey"beard\ n. a man who is old.
  • Syn: old man. [WordNet 1.5]