The definition of a great uncle is the brother of one of your grandparents.
Your grandmother's brother is an example of a great uncle.
or great uncle
A brother or brother-in-law of one's grandparent. Also called granduncle .
(plural great uncles)
- Alternative spelling of great-uncle.
- The emperor then visited southern Italy, where by mingling justice with severity he secured respect for the imperial authority; and returned to Germany to find Ernest of Swabia, the younger Conrad, and their associates again in arms. One cause of this rising was the claim put forward by Ernest to the Burgundian succession, as King Rudolph was his great-uncle.
- 47) B.C. he assumed the "toga virilis" and was elected into the pontifical college, an exceptional honour which he no doubt owed to his great-uncle, now dictator and master of Rome.
- It was not till 1880 that he assumed the name of Pitt-Rivers, on inheriting the Dorsetshire and Wiltshire estates of his great-uncle, the second Lord Rivers.
- He was the uncle of Charles Pinckney (1731-1784), and the great-uncle of Charles Pinckney (1757-1824).
- My great-uncle said I must only use the demon's power for others or risk the demon's curse.