This flashcard defines "granny" as an informal term for "grandmother", also known as "grannie". It provides the pronunciation and an example sentence. An additional use of "granny" as an adjective meaning "of a style typically used by old women" is also noted for British English.
granny
（外）祖母；奶奶；外婆
Some people refer to their grandmother as granny.
...my old granny.
granny
ˈɡræni; ˈɡræni
noun
[plural grannies]
informal
grandmother
奶奶；姥姥
see also grandma
granny
(also grannie)
noun
grandmother