맞선이 · 맞선을
arranged blind date (with marriage in mind)
Example
어머니 친구의 소개로 맞선을 봤어요.
I went on a marriage-minded blind date set up by my mom's friend.
Word parts
맞- 'facing each other' + 선, as in 선을 보다 'to size someone up for marriage.'
Good to know
Use with 보다: 맞선을 보다. 소개팅 is the casual, no-pressure version.