'Granduncle' definitions:
Definition of 'granduncle'
From: WordNet
noun
An uncle of your father or mother [syn: great-uncle, granduncle]
Definition of 'Granduncle'
From: GCIDE
- Granduncle \Grand"un"cle\, n. [Cf. F. grand-oncle.] A father's or mother's uncle. [1913 Webster] grand unified theory