noun
half-mast flag; flag at half-staff
Used in mourning or commemorative contexts. Often appears in the phrase 半旗を掲げる (to fly a flag at half-mast).
国葬の日、各地で半旗が掲げられた。
On the day of the state funeral, flags were flown at half-mast across the country.
弔意を示すため、半旗を掲げてください。
Please fly the flag at half-mast to express condolences.