This is the 710th most frequent Korean word.
말한
"말한" means "spoken" or "said."
In this context, '말한' functions as a modifier for '계획', indicating the plan that was mentioned yesterday.
어제 말한 계획을 다시 설명해 주시겠어요?
Could you explain the plan you mentioned yesterday again?
Here, '말한' refers to the statements or words that he said, leading to the unfolding situation.
그가 말한 그대로 상황이 진행되었다.
The situation unfolded exactly as he said.
In this sentence, '말한' modifies '의견', showing the specific opinion she had conveyed earlier.