잠시만요 = Just a moment; 잠시 후에 = shortly
for a moment, briefly
Example
손님 여러분, 잠시 후에 열차가 출발합니다.
Passengers, the train will depart shortly.
Word parts
잠 brief+시 time
Literally 'brief time'.
Good to know
잠시만요 is a polite 'One moment, please' or 'Excuse me' when squeezing past people.
Related words