noun
priority seat; courtesy seat
Seats on trains, buses, etc. reserved for the elderly, disabled, pregnant women, and those with small children. Often marked with a special sign.
電車の優先席はお年寄りや体の不自由な方のための席です。
Priority seats on trains are for the elderly and people with disabilities.
優先席付近では携帯電話の電源をお切りください。
Please turn off your mobile phone near the priority seats.