선약 [先約] a previous engagement. ~이 없다 have no previous engagement / be disengaged / be free. ~이 있어서 참석할 수 없다 I'm afraid a previous engagement will prevent me from attending. 저는 ~이 있습니다 I have a previous engagement.선약 [仙藥] an eli+모두 보이기...xir; (a) medicine with magical (healing) power.