When you've heard or found something you don't understand, to get clear meaning of it, you can ask in Korean '무슨 뜻이에요?'

"무슨 뜻이에요?'

Minsu:  Joan, are you busy this weekend?

Joan:    I don't know 'weekend'. 

            What does that mean?

Minsu:  It means Saturday and Sunday.

Joan:    Is that so? I'm not busy this weekend.

Minsu:  Will you go hiking?

Joan:    O.K.

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Minsu:  조앤, 이번 주말에 바빠요? (ibeon jumal-e bappayo?)

Joan:    ‘주말’ 몰라요. ('jumal' mollayo.)

             무슨 뜻이에요? (museun tteut ieyo?)

Minsu:   ‘주말’은 토요일과 일요일이에요.('jumal' eun toyoil gwa ilyoil ieyo.)

Joan:      아 그래요? 주말에 안 바빠요. (a geuraeyo? jumale an bappayo.)

Minsu:    같이 하이킹 갈래요? (gachi haiking gallayo?)

Joan:      네 좋아요. (ne joayo.)

● 이번 주말: this weekend

● ~ 는(은) 바빠요/ ~는(은) 안 바빠요.: (예: 그는 바빠요/ 그 사람은 안 바빠요)

● 그(이)게 무슨 뜻이에요?

● ~ 갈래요? (예: 쇼핑 갈래요?)