그 할머니

that grandmother

→ 그
phrase Rare #19,863
that grandmother Refers to a specific grandmother or elderly woman already known from the context. 할머니 can also be a respectful term for an older woman who is not the speaker's actual grandmother.
KO: 그 할머니는 매일 공원에 오세요.
EN: That elderly woman comes to the park every day.

그 할머니 혼자 살아

That old lady lives alone.

— 알.이.씨 (2007)

그 할머니 집에 누가 있었어요

Who was at that old woman's house?

— 알.이.씨 (2007)

맞다 그 할머니 시죠?

Right, you're that grandmother, aren't you?

— 알.이.씨 (2007)